Bug 96807

I would like to minimize the latency time between the audio input from the Cirrus Logic Audio Card (for raspberry Pi2) and the audio output over bluetooth speaker. I note an important time separation between my input voice on the output on Bluetooth and I would like to minimize this time. I tried to control the latency with the command:

pactl load-module module-loopback latency_msec=1 source="alsa_input.platform-sound.analog-stereo" sink="bluez_sink.B8_27_EB_00_82_2D"

or

pacat -r --latency=102800 -d alsa_input.platform-sound.analog-stereo | pacat -p --latency=102800 -d bluez_sink.B8_27_EB_00_82_2D

but it seems that the options are ignored.
Below my sink and reference source:

Sink #2
	State: SUSPENDED
	Name: bluez_sink.B8_27_EB_00_82_2D
	Description: BlueAni-00822d
	Driver: module-bluez5-device.c
	Sample Specification: s16le 2ch 44100Hz
	Channel Map: front-left,front-right
	Owner Module: 15
	Mute: no
	Volume: front-left: 65536 / 100% / 0.00 dB,   front-right: 65536 / 100% / 0.00 dB
	        balance 0.00
	Base Volume: 65536 / 100% / 0.00 dB
	Monitor Source: bluez_sink.B8_27_EB_00_82_2D.monitor
	Latency: 0 usec, configured 0 usec
	Flags: HARDWARE DECIBEL_VOLUME LATENCY 
	Properties:
		bluetooth.protocol = "a2dp_sink"
		device.description = "BlueAni-00822d"
		device.string = "B8:27:EB:00:82:2D"
		device.api = "bluez"
		device.class = "sound"
		device.bus = "bluetooth"
		bluez.path = "/org/bluez/hci0/dev_B8_27_EB_00_82_2D"
		bluez.class = "0x0c0000"
		bluez.alias = "BlueAni-00822d"
		device.icon_name = "audio-card-bluetooth"
	Ports:
		unknown-output: Bluetooth Output (priority: 0)
	Active Port: unknown-output
	Formats:
		pcm


Source #1
	State: SUSPENDED
	Name: alsa_input.platform-sound.analog-stereo
	Description: snd_rpi_wsp Analog Stereo
	Driver: module-alsa-card.c
	Sample Specification: s16le 2ch 44100Hz
	Channel Map: front-left,front-right
	Owner Module: 1
	Mute: no
	Volume: front-left: 65536 / 100% / 0.00 dB,   front-right: 65536 / 100% / 0.00 dB
	        balance 0.00
	Base Volume: 65536 / 100% / 0.00 dB
	Monitor of Sink: n/a
	Latency: 0 usec, configured 0 usec
	Flags: HARDWARE DECIBEL_VOLUME LATENCY 
	Properties:
		alsa.resolution_bits = "16"
		device.api = "alsa"
		device.class = "sound"
		alsa.class = "generic"
		alsa.subclass = "generic-mix"
		alsa.name = ""
		alsa.id = "WM5102 AiFi wm5102-aif1-0"
		alsa.subdevice = "0"
		alsa.subdevice_name = "subdevice #0"
		alsa.device = "0"
		alsa.card = "1"
		alsa.card_name = "snd_rpi_wsp"
		alsa.long_card_name = "snd_rpi_wsp"
		alsa.driver_name = "snd_soc_rpi_wsp"
		device.bus_path = "platform-sound"
		sysfs.path = "/devices/platform/sound/sound/card1"
		device.string = "hw:1"
		device.buffering.buffer_size = "352800"
		device.buffering.fragment_size = "58800"
		device.access_mode = "mmap+timer"
		device.profile.name = "analog-stereo"
		device.profile.description = "Analog Stereo"
		device.description = "snd_rpi_wsp Analog Stereo"
		module-udev-detect.discovered = "1"
		device.icon_name = "audio-card"
	Ports:
		analog-input: Analog Input (priority: 10000)
	Active Port: analog-input
	Formats:
		pcm


I take it for granted that the bluetooth latency output is already at zero, How can I control this latency.