Wherein reported are the reports that you asked me.
Debian wheezy with kernel 3.12.25 :

pi@raspberrypi ~ $ uname -a
Linux raspberrypi 3.12.25+ #29 PREEMPT Sun Sep 21 08:38:08 CEST 2014 armv6l GNU/Linux


pi@raspberrypi ~ $ pactl list
Module #0
	Name: module-alsa-card
	Argument: device_id="0" name="platform-snd-hifiberry-amp.0" card_name="alsa_card.platform-snd-hifiberry-amp.0" namereg_fail=false tsched=yes fixed_latency_range=no ignore_dB=no deferred_volume=yes card_properties="module-udev-detect.discovered=1"
	Usage counter: 3
	Properties:
		module.author = "Lennart Poettering"
		module.description = "ALSA Card"
		module.version = "2.0"

Module #1
	Name: module-udev-detect
	Argument: 
	Usage counter: n/a
	Properties:
		module.author = "Lennart Poettering"
		module.description = "Detect available audio hardware and load matching drivers"
		module.version = "2.0"

Module #2
	Name: module-native-protocol-unix
	Argument: 
	Usage counter: n/a
	Properties:
		module.author = "Lennart Poettering"
		module.description = "Native protocol (UNIX sockets)"
		module.version = "2.0"

Module #3
	Name: module-stream-restore
	Argument: 
	Usage counter: n/a
	Properties:
		module.author = "Lennart Poettering"
		module.description = "Automatically restore the volume/mute/device state of streams"
		module.version = "2.0"

Module #4
	Name: module-device-restore
	Argument: 
	Usage counter: n/a
	Properties:
		module.author = "Lennart Poettering"
		module.description = "Automatically restore the volume/mute state of devices"
		module.version = "2.0"

Module #5
	Name: module-default-device-restore
	Argument: 
	Usage counter: n/a
	Properties:
		module.author = "Lennart Poettering"
		module.description = "Automatically restore the default sink and source"
		module.version = "2.0"

Module #6
	Name: module-dbus-protocol
	Argument: access=local
	Usage counter: n/a
	Properties:
		module.author = "Tanu Kaskinen"
		module.description = "D-Bus interface"
		module.version = "2.0"

Module #7
	Name: module-rescue-streams
	Argument: 
	Usage counter: n/a
	Properties:
		module.author = "Lennart Poettering"
		module.description = "When a sink/source is removed, try to move their streams to the default sink/source"
		module.version = "2.0"

Module #8
	Name: module-always-sink
	Argument: 
	Usage counter: n/a
	Properties:
		module.author = "Colin Guthrie"
		module.description = "Always keeps at least one sink loaded even if it's a null one"
		module.version = "2.0"

Module #9
	Name: module-position-event-sounds
	Argument: 
	Usage counter: n/a
	Properties:
		module.author = "Lennart Poettering"
		module.description = "Position event sounds between L and R depending on the position on screen of the widget triggering them."
		module.version = "2.0"

Module #10
	Name: module-native-protocol-tcp
	Argument: auth-ip-acl=127.0.0.1;192.168.0.0/24 auth-anonymous=1
	Usage counter: n/a
	Properties:
		module.author = "Lennart Poettering"
		module.description = "Native protocol (TCP sockets)"
		module.version = "2.0"

Module #11
	Name: module-zeroconf-publish
	Argument: 
	Usage counter: n/a
	Properties:
		module.author = "Lennart Poettering"
		module.description = "mDNS/DNS-SD Service Publisher"
		module.version = "2.0"

Sink #0
	State: RUNNING
	Name: alsa_output.platform-snd-hifiberry-amp.0.analog-stereo
	Description: snd_rpi_hifiberry_amp Analog Stereo
	Driver: module-alsa-card.c
	Sample Specification: s16le 2ch 44100Hz
	Channel Map: front-left,front-right
	Owner Module: 0
	Mute: no
	Volume: 0:  70% 1:  70%
	        balance 0.00
	Base Volume: 100%
	Monitor Source: alsa_output.platform-snd-hifiberry-amp.0.analog-stereo.monitor
	Latency: 104494 usec, configured 105000 usec
	Flags: HARDWARE HW_VOLUME_CTRL LATENCY 
	Properties:
		alsa.resolution_bits = "16"
		device.api = "alsa"
		device.class = "sound"
		alsa.class = "generic"
		alsa.subclass = "generic-mix"
		alsa.name = ""
		alsa.id = "HifiBerry AMP HiFi tas5713-hifi-0"
		alsa.subdevice = "0"
		alsa.subdevice_name = "subdevice #0"
		alsa.device = "0"
		alsa.card = "0"
		alsa.card_name = "snd_rpi_hifiberry_amp"
		alsa.long_card_name = "snd_rpi_hifiberry_amp"
		alsa.driver_name = "snd_soc_hifiberry_amp"
		device.bus_path = "platform-snd-hifiberry-amp.0"
		sysfs.path = "/devices/platform/snd-hifiberry-amp.0/sound/card0"
		device.string = "front:0"
		device.buffering.buffer_size = "352800"
		device.buffering.fragment_size = "176400"
		device.access_mode = "mmap+timer"
		device.profile.name = "analog-stereo"
		device.profile.description = "Analog Stereo"
		device.description = "snd_rpi_hifiberry_amp Analog Stereo"
		module-udev-detect.discovered = "1"
		device.icon_name = "audio-card"
	Ports:
		analog-output: Analog Output (priority: 9900)
	Active Port: analog-output
	Formats:
		pcm

Source #0
	State: RUNNING
	Name: alsa_output.platform-snd-hifiberry-amp.0.analog-stereo.monitor
	Description: Monitor of snd_rpi_hifiberry_amp Analog Stereo
	Driver: module-alsa-card.c
	Sample Specification: s16le 2ch 44100Hz
	Channel Map: front-left,front-right
	Owner Module: 0
	Mute: no
	Volume: 0: 100% 1: 100%
	        0: 0.00 dB 1: 0.00 dB
	        balance 0.00
	Base Volume: 100%
	             0.00 dB
	Monitor of Sink: alsa_output.platform-snd-hifiberry-amp.0.analog-stereo
	Latency: 0 usec, configured 2000000 usec
	Flags: DECIBEL_VOLUME LATENCY 
	Properties:
		device.description = "Monitor of snd_rpi_hifiberry_amp Analog Stereo"
		device.class = "monitor"
		alsa.card = "0"
		alsa.card_name = "snd_rpi_hifiberry_amp"
		alsa.long_card_name = "snd_rpi_hifiberry_amp"
		alsa.driver_name = "snd_soc_hifiberry_amp"
		device.bus_path = "platform-snd-hifiberry-amp.0"
		sysfs.path = "/devices/platform/snd-hifiberry-amp.0/sound/card0"
		device.string = "0"
		module-udev-detect.discovered = "1"
		device.icon_name = "audio-card"
	Formats:
		pcm

Sink Input #0
	Driver: protocol-native.c
	Owner Module: 2
	Client: 0
	Sink: 0
	Sample Specification: s16le 2ch 44100Hz
	Channel Map: front-left,front-right
	Format: pcm, format.sample_format = "\"s16le\""  format.rate = "44100"  format.channels = "2"  format.channel_map = "\"front-left,front-right\""
	Mute: no
	Volume: 0: 100% 1: 100%
	        0: 0.00 dB 1: 0.00 dB
	        balance 0.00
	Buffer Latency: 0 usec
	Sink Latency: 82373 usec
	Resample method: n/a
	Properties:
		media.name = "Shairport Stream"
		application.name = "AirAni-b35336"
		native-protocol.peer = "UNIX socket client"
		native-protocol.version = "26"
		application.process.id = "2218"
		application.process.user = "pi"
		application.process.host = "raspberrypi"
		application.process.binary = "shairport"
		application.language = "C"
		application.process.machine_id = "d3670ff77a0bb988a953e7f053a3f4e7"
		module-stream-restore.id = "sink-input-by-application-name:AirAni-b35336"

Source Output #0
	Driver: protocol-native.c
	Owner Module: 2
	Client: 4
	Source: 0
	Sample Specification: s16le 2ch 44100Hz
	Channel Map: front-left,front-right
	Format: pcm, format.sample_format = "\"s16le\""  format.rate = "44100"  format.channels = "2"  format.channel_map = "\"front-left,front-right\""
	Mute: no
	Volume: 0: 100% 1: 100%
	        0: 0.00 dB 1: 0.00 dB
	        balance 0.00
	Buffer Latency: 58775 usec
	Source Latency: 0 usec
	Resample method: n/a
	Properties:
		media.name = "cimpulse"
		application.name = "cimpulse"
		native-protocol.peer = "UNIX socket client"
		native-protocol.version = "26"
		application.process.id = "2341"
		application.process.user = "pi"
		application.process.host = "raspberrypi"
		application.process.binary = "LightSone"
		application.language = "C"
		application.process.machine_id = "d3670ff77a0bb988a953e7f053a3f4e7"
		module-stream-restore.id = "source-output-by-application-name:cimpulse"

Client #0
	Driver: protocol-native.c
	Owner Module: 2
	Properties:
		application.name = "AirAni-b35336"
		native-protocol.peer = "UNIX socket client"
		native-protocol.version = "26"
		application.process.id = "2218"
		application.process.user = "pi"
		application.process.host = "raspberrypi"
		application.process.binary = "shairport"
		application.language = "C"
		application.process.machine_id = "d3670ff77a0bb988a953e7f053a3f4e7"

Client #4
	Driver: protocol-native.c
	Owner Module: 2
	Properties:
		application.name = "cimpulse"
		native-protocol.peer = "UNIX socket client"
		native-protocol.version = "26"
		application.process.id = "2341"
		application.process.user = "pi"
		application.process.host = "raspberrypi"
		application.process.binary = "LightSone"
		application.language = "C"
		application.process.machine_id = "d3670ff77a0bb988a953e7f053a3f4e7"

Client #7
	Driver: protocol-native.c
	Owner Module: 10
	Properties:
		application.name = "pactl"
		native-protocol.peer = "TCP/IP client from 127.0.0.1:43601"
		native-protocol.version = "26"
		application.process.id = "2677"
		application.process.user = "pi"
		application.process.host = "raspberrypi"
		application.process.binary = "pactl"
		application.language = "en_GB.UTF-8"
		window.x11.display = ":0.0"
		application.process.machine_id = "d3670ff77a0bb988a953e7f053a3f4e7"
		application.process.session_id = "d3670ff77a0bb988a953e7f053a3f4e7-1411426031.986903-1502075250"

Card #0
	Name: alsa_card.platform-snd-hifiberry-amp.0
	Driver: module-alsa-card.c
	Owner Module: 0
	Properties:
		alsa.card = "0"
		alsa.card_name = "snd_rpi_hifiberry_amp"
		alsa.long_card_name = "snd_rpi_hifiberry_amp"
		alsa.driver_name = "snd_soc_hifiberry_amp"
		device.bus_path = "platform-snd-hifiberry-amp.0"
		sysfs.path = "/devices/platform/snd-hifiberry-amp.0/sound/card0"
		device.string = "0"
		device.description = "snd_rpi_hifiberry_amp"
		module-udev-detect.discovered = "1"
		device.icon_name = "audio-card"
	Profiles:
		output:analog-stereo: Analog Stereo Output (sinks: 1, sources: 0, priority. 6000)
		off: Off (sinks: 0, sources: 0, priority. 0)
	Active Profile: output:analog-stereo
	Ports:
		analog-output: Analog Output (priority: 9900)
			Part of profile(s): output:analog-stereo

CPU usage by pulseaudio without streaming audio before and after with streaming audio:

pi@raspberrypi ~ $ top

top - 00:49:54 up 3 min,  2 users,  load average: 0.77, 0.54, 0.23
Tasks:  99 total,   1 running,  98 sleeping,   0 stopped,   0 zombie
%Cpu(s):  3.1 us,  3.4 sy,  1.0 ni, 92.5 id,  0.0 wa,  0.0 hi,  0.0 si,  0.0 st
KiB Mem:    447988 total,   177748 used,   270240 free,    23140 buffers
KiB Swap:   102396 total,        0 used,   102396 free,    78768 cached

  PID USER      PR  NI  VIRT  RES  SHR S  %CPU %MEM    TIME+  COMMAND           
 2140 pulse      9 -11 88304 8956 3584 S   2.3  2.0   0:15.71 pulseaudio        
 2392 root      20   0 23944  15m 4776 S   1.6  3.6   0:06.13 Xorg              
 2650 pi        20   0  4672 1368 1020 R   1.3  0.3   0:00.22 top               
 2341 root      30  10 91464 2264 1816 S   1.0  0.5   0:01.99 LightSone         
 2609 pi        20   0  113m  10m 8424 S   0.7  2.4   0:03.12 lxterminal        
   39 root      20   0     0    0    0 S   0.3  0.0   0:01.29 mmcqd/0           
  230 root      20   0     0    0    0 S   0.3  0.0   0:01.87 usb-storage       
  268 root      20   0     0    0    0 S   0.3  0.0   0:00.41 kworker/0:2       
 2263 root      20   0     0    0    0 S   0.3  0.0   0:00.30 RTW_CMD_THREAD   


pi@raspberrypi ~ $ top

top - 00:48:22 up 2 min,  2 users,  load average: 0.64, 0.35, 0.14
Tasks:  97 total,   1 running,  96 sleeping,   0 stopped,   0 zombie
%Cpu(s): 17.3 us, 13.1 sy,  0.7 ni, 67.8 id,  0.0 wa,  0.0 hi,  1.0 si,  0.0 st
KiB Mem:    447988 total,   147380 used,   300608 free,    14412 buffers
KiB Swap:   102396 total,        0 used,   102396 free,    69540 cached

  PID USER      PR  NI  VIRT  RES  SHR S  %CPU %MEM    TIME+  COMMAND           
 2140 pulse      9 -11 88304 7864 3584 S  15.3  1.8   0:05.05 pulseaudio        
 2218 pi        20   0  115m 3896 2412 S  11.7  0.9   0:02.37 shairport         
 2392 root      20   0 17412  10m 4076 S   2.0  2.3   0:02.13 Xorg              
 2627 pi        20   0  4672 1368 1020 R   1.3  0.3   0:00.30 top               
 2341 root      30  10 91464 2264 1816 S   1.0  0.5   0:00.97 LightSone         
    6 root      20   0     0    0    0 S   0.3  0.0   0:00.27 kworker/u2:0      
  268 root      20   0     0    0    0 S   0.3  0.0   0:00.15 kworker/0:2       
 2263 root      20   0     0    0    0 S   0.3  0.0   0:00.15 RTW_CMD_THREAD    
 2498 pi        20   0  103m 8708 6896 S   0.3  1.9   0:01.42 lxpanel           
 2609 pi        20   0  112m 9568 7444 S   0.3  2.1   0:01.02 lxterminal        

Debian wheezy with kernel 3.12.28 :

pi@raspberrypi ~ $ uname -a
Linux raspberrypi 3.12.28+ #713 PREEMPT Fri Sep 19 16:43:32 BST 2014 armv6l GNU/Linux



pi@raspberrypi ~ $ pactl list
Module #0
	Name: module-alsa-card
	Argument: device_id="0" name="platform-snd-hifiberry-amp.0" card_name="alsa_card.platform-snd-hifiberry-amp.0" namereg_fail=false tsched=yes fixed_latency_range=no ignore_dB=no deferred_volume=yes card_properties="module-udev-detect.discovered=1"
	Usage counter: 3
	Properties:
		module.author = "Lennart Poettering"
		module.description = "ALSA Card"
		module.version = "2.0"

Module #1
	Name: module-udev-detect
	Argument: 
	Usage counter: n/a
	Properties:
		module.author = "Lennart Poettering"
		module.description = "Detect available audio hardware and load matching drivers"
		module.version = "2.0"

Module #2
	Name: module-native-protocol-unix
	Argument: 
	Usage counter: n/a
	Properties:
		module.author = "Lennart Poettering"
		module.description = "Native protocol (UNIX sockets)"
		module.version = "2.0"

Module #3
	Name: module-stream-restore
	Argument: 
	Usage counter: n/a
	Properties:
		module.author = "Lennart Poettering"
		module.description = "Automatically restore the volume/mute/device state of streams"
		module.version = "2.0"

Module #4
	Name: module-device-restore
	Argument: 
	Usage counter: n/a
	Properties:
		module.author = "Lennart Poettering"
		module.description = "Automatically restore the volume/mute state of devices"
		module.version = "2.0"

Module #5
	Name: module-default-device-restore
	Argument: 
	Usage counter: n/a
	Properties:
		module.author = "Lennart Poettering"
		module.description = "Automatically restore the default sink and source"
		module.version = "2.0"

Module #6
	Name: module-dbus-protocol
	Argument: access=local
	Usage counter: n/a
	Properties:
		module.author = "Tanu Kaskinen"
		module.description = "D-Bus interface"
		module.version = "2.0"

Module #7
	Name: module-rescue-streams
	Argument: 
	Usage counter: n/a
	Properties:
		module.author = "Lennart Poettering"
		module.description = "When a sink/source is removed, try to move their streams to the default sink/source"
		module.version = "2.0"

Module #8
	Name: module-always-sink
	Argument: 
	Usage counter: n/a
	Properties:
		module.author = "Colin Guthrie"
		module.description = "Always keeps at least one sink loaded even if it's a null one"
		module.version = "2.0"

Module #9
	Name: module-position-event-sounds
	Argument: 
	Usage counter: n/a
	Properties:
		module.author = "Lennart Poettering"
		module.description = "Position event sounds between L and R depending on the position on screen of the widget triggering them."
		module.version = "2.0"

Module #10
	Name: module-native-protocol-tcp
	Argument: auth-ip-acl=127.0.0.1;192.168.0.0/24 auth-anonymous=1
	Usage counter: n/a
	Properties:
		module.author = "Lennart Poettering"
		module.description = "Native protocol (TCP sockets)"
		module.version = "2.0"

Module #11
	Name: module-zeroconf-publish
	Argument: 
	Usage counter: n/a
	Properties:
		module.author = "Lennart Poettering"
		module.description = "mDNS/DNS-SD Service Publisher"
		module.version = "2.0"

Sink #0
	State: RUNNING
	Name: alsa_output.platform-snd-hifiberry-amp.0.analog-stereo
	Description: snd_rpi_hifiberry_amp Analog Stereo
	Driver: module-alsa-card.c
	Sample Specification: s16le 2ch 44100Hz
	Channel Map: front-left,front-right
	Owner Module: 0
	Mute: no
	Volume: 0:  70% 1:  70%
	        balance 0.00
	Base Volume: 100%
	Monitor Source: alsa_output.platform-snd-hifiberry-amp.0.analog-stereo.monitor
	Latency: 887328 usec, configured 756000 usec
	Flags: HARDWARE HW_VOLUME_CTRL LATENCY 
	Properties:
		alsa.resolution_bits = "16"
		device.api = "alsa"
		device.class = "sound"
		alsa.class = "generic"
		alsa.subclass = "generic-mix"
		alsa.name = ""
		alsa.id = "HifiBerry AMP HiFi tas5713-hifi-0"
		alsa.subdevice = "0"
		alsa.subdevice_name = "subdevice #0"
		alsa.device = "0"
		alsa.card = "0"
		alsa.card_name = "snd_rpi_hifiberry_amp"
		alsa.long_card_name = "snd_rpi_hifiberry_amp"
		alsa.driver_name = "snd_soc_hifiberry_amp"
		device.bus_path = "platform-snd-hifiberry-amp.0"
		sysfs.path = "/devices/platform/snd-hifiberry-amp.0/sound/card0"
		device.string = "front:0"
		device.buffering.buffer_size = "352800"
		device.buffering.fragment_size = "176400"
		device.access_mode = "mmap+timer"
		device.profile.name = "analog-stereo"
		device.profile.description = "Analog Stereo"
		device.description = "snd_rpi_hifiberry_amp Analog Stereo"
		module-udev-detect.discovered = "1"
		device.icon_name = "audio-card"
	Ports:
		analog-output: Analog Output (priority: 9900)
	Active Port: analog-output
	Formats:
		pcm

Source #0
	State: RUNNING
	Name: alsa_output.platform-snd-hifiberry-amp.0.analog-stereo.monitor
	Description: Monitor of snd_rpi_hifiberry_amp Analog Stereo
	Driver: module-alsa-card.c
	Sample Specification: s16le 2ch 44100Hz
	Channel Map: front-left,front-right
	Owner Module: 0
	Mute: no
	Volume: 0: 100% 1: 100%
	        0: 0.00 dB 1: 0.00 dB
	        balance 0.00
	Base Volume: 100%
	             0.00 dB
	Monitor of Sink: alsa_output.platform-snd-hifiberry-amp.0.analog-stereo
	Latency: 0 usec, configured 2000000 usec
	Flags: DECIBEL_VOLUME LATENCY 
	Properties:
		device.description = "Monitor of snd_rpi_hifiberry_amp Analog Stereo"
		device.class = "monitor"
		alsa.card = "0"
		alsa.card_name = "snd_rpi_hifiberry_amp"
		alsa.long_card_name = "snd_rpi_hifiberry_amp"
		alsa.driver_name = "snd_soc_hifiberry_amp"
		device.bus_path = "platform-snd-hifiberry-amp.0"
		sysfs.path = "/devices/platform/snd-hifiberry-amp.0/sound/card0"
		device.string = "0"
		module-udev-detect.discovered = "1"
		device.icon_name = "audio-card"
	Formats:
		pcm

Sink Input #0
	Driver: protocol-native.c
	Owner Module: 2
	Client: 0
	Sink: 0
	Sample Specification: s16le 2ch 44100Hz
	Channel Map: front-left,front-right
	Format: pcm, format.sample_format = "\"s16le\""  format.rate = "44100"  format.channels = "2"  format.channel_map = "\"front-left,front-right\""
	Mute: no
	Volume: 0: 100% 1: 100%
	        0: 0.00 dB 1: 0.00 dB
	        balance 0.00
	Buffer Latency: 0 usec
	Sink Latency: 810395 usec
	Resample method: n/a
	Properties:
		media.name = "Shairport Stream"
		application.name = "AirAni-b35336"
		native-protocol.peer = "UNIX socket client"
		native-protocol.version = "26"
		application.process.id = "2162"
		application.process.user = "pi"
		application.process.host = "raspberrypi"
		application.process.binary = "shairport"
		application.language = "C"
		application.process.machine_id = "d3670ff77a0bb988a953e7f053a3f4e7"
		module-stream-restore.id = "sink-input-by-application-name:AirAni-b35336"

Source Output #0
	Driver: protocol-native.c
	Owner Module: 2
	Client: 4
	Source: 0
	Sample Specification: s16le 2ch 44100Hz
	Channel Map: front-left,front-right
	Format: pcm, format.sample_format = "\"s16le\""  format.rate = "44100"  format.channels = "2"  format.channel_map = "\"front-left,front-right\""
	Mute: no
	Volume: 0: 100% 1: 100%
	        0: 0.00 dB 1: 0.00 dB
	        balance 0.00
	Buffer Latency: 795986 usec
	Source Latency: 0 usec
	Resample method: n/a
	Properties:
		media.name = "cimpulse"
		application.name = "cimpulse"
		native-protocol.peer = "UNIX socket client"
		native-protocol.version = "26"
		application.process.id = "2280"
		application.process.user = "pi"
		application.process.host = "raspberrypi"
		application.process.binary = "LightSone"
		application.language = "C"
		application.process.machine_id = "d3670ff77a0bb988a953e7f053a3f4e7"
		module-stream-restore.id = "source-output-by-application-name:cimpulse"

Client #0
	Driver: protocol-native.c
	Owner Module: 2
	Properties:
		application.name = "AirAni-b35336"
		native-protocol.peer = "UNIX socket client"
		native-protocol.version = "26"
		application.process.id = "2162"
		application.process.user = "pi"
		application.process.host = "raspberrypi"
		application.process.binary = "shairport"
		application.language = "C"
		application.process.machine_id = "d3670ff77a0bb988a953e7f053a3f4e7"

Client #4
	Driver: protocol-native.c
	Owner Module: 2
	Properties:
		application.name = "cimpulse"
		native-protocol.peer = "UNIX socket client"
		native-protocol.version = "26"
		application.process.id = "2280"
		application.process.user = "pi"
		application.process.host = "raspberrypi"
		application.process.binary = "LightSone"
		application.language = "C"
		application.process.machine_id = "d3670ff77a0bb988a953e7f053a3f4e7"

Client #7
	Driver: protocol-native.c
	Owner Module: 10
	Properties:
		application.name = "pactl"
		native-protocol.peer = "TCP/IP client from 127.0.0.1:37702"
		native-protocol.version = "26"
		application.process.id = "2624"
		application.process.user = "pi"
		application.process.host = "raspberrypi"
		application.process.binary = "pactl"
		application.language = "en_GB.UTF-8"
		window.x11.display = ":0.0"
		application.process.machine_id = "d3670ff77a0bb988a953e7f053a3f4e7"
		application.process.session_id = "d3670ff77a0bb988a953e7f053a3f4e7-1412248712.131666-566053987"

Card #0
	Name: alsa_card.platform-snd-hifiberry-amp.0
	Driver: module-alsa-card.c
	Owner Module: 0
	Properties:
		alsa.card = "0"
		alsa.card_name = "snd_rpi_hifiberry_amp"
		alsa.long_card_name = "snd_rpi_hifiberry_amp"
		alsa.driver_name = "snd_soc_hifiberry_amp"
		device.bus_path = "platform-snd-hifiberry-amp.0"
		sysfs.path = "/devices/platform/snd-hifiberry-amp.0/sound/card0"
		device.string = "0"
		device.description = "snd_rpi_hifiberry_amp"
		module-udev-detect.discovered = "1"
		device.icon_name = "audio-card"
	Profiles:
		output:analog-stereo: Analog Stereo Output (sinks: 1, sources: 0, priority. 6000)
		off: Off (sinks: 0, sources: 0, priority. 0)
	Active Profile: output:analog-stereo
	Ports:
		analog-output: Analog Output (priority: 9900)
			Part of profile(s): output:analog-stereo


CPU usage by pulseaudio without streaming audio before and after with streaming audio:


pi@raspberrypi ~ $ top

top - 13:20:09 up 2 min,  2 users,  load average: 0.84, 0.65, 0.27
Tasks:  99 total,   1 running,  98 sleeping,   0 stopped,   0 zombie
%Cpu(s): 11.7 us,  7.2 sy,  2.8 ni, 77.9 id,  0.3 wa,  0.0 hi,  0.0 si,  0.0 st
KiB Mem:    447864 total,   177192 used,   270672 free,    24216 buffers
KiB Swap:   102396 total,        0 used,   102396 free,    80724 cached

  PID USER      PR  NI  VIRT  RES  SHR S  %CPU %MEM    TIME+  COMMAND           
 2103 pulse      9 -11 88336 8296 3592 S  13.4  1.9   0:21.52 pulseaudio        
 2280 root      30  10 91464 2284 1836 S   4.2  0.5   0:05.24 LightSone         
 2605 pi        20   0  4672 1380 1032 R   2.0  0.3   0:00.33 top               
 2356 root      20   0 22916  14m 4852 S   1.6  3.3   0:04.51 Xorg              
 2515 pi        20   0  104m 9732 7324 S   0.3  2.2   0:02.22 lxpanel           
 2586 pi        20   0  114m  10m 8532 S   0.3  2.4   0:01.70 lxterminal     


pi@raspberrypi ~ $ top

top - 13:23:06 up 5 min,  2 users,  load average: 1.26, 0.78, 0.38
Tasks:  97 total,   1 running,  96 sleeping,   0 stopped,   0 zombie
%Cpu(s): 51.6 us, 39.9 sy,  0.3 ni,  0.0 id,  0.0 wa,  0.0 hi,  8.2 si,  0.0 st
KiB Mem:    447864 total,   209352 used,   238512 free,    24312 buffers
KiB Swap:   102396 total,        0 used,   102396 free,    81488 cached

  PID USER      PR  NI  VIRT  RES  SHR S  %CPU %MEM    TIME+  COMMAND                                                                               
 2103 pulse      9 -11 88336  35m 3604 S  58.0  8.1   0:53.72 pulseaudio                                                                            
 2162 pi        20   0  115m 4172 2756 S  34.1  0.9   0:06.71 shairport                                                                             
 2280 root      30  10 91464 2304 1856 S   2.2  0.5   0:12.51 LightSone                                                                             
 2356 root      20   0 25648  17m 5108 S   2.2  4.0   0:17.51 Xorg                                                                                  
 2638 pi        20   0  4672 1380 1032 R   1.3  0.3   0:00.58 top                                                                                   
 2586 pi        20   0  114m  10m 8672 S   0.9  2.5   0:06.94 lxterminal                                                                            
    3 root      20   0     0    0    0 S   0.3  0.0   0:01.06 ksoftirqd/0                                                                           
    4 root      20   0     0    0    0 S   0.3  0.0   0:00.33 kworker/0:0                                                                           
 2236 root      20   0     0    0    0 S   0.3  0.0   0:00.51 RTW_CMD_THREAD                                                                        
 2515 pi        20   0  104m 9796 7388 S   0.3  2.2   0:03.05 lxpanel