Grave áudio de entrada de linha de dois aplicativos usando o Alsa

Question

Atualmente, estou trabalhando em um pequeno aplicativo que é executado em um cubieboard (ARMv7, parecido com o grosa-pi).

O que eu realmente preciso fazer é acessar e gravar o sinal de áudio de entrada de linha de dois aplicativos diferentes.

O primeiro é o PyAudio e o segundo um Media Streamer do Darkice . A placa de som usa o driver de kernel sun4i-CODEC dos desenvolvedores do cubieboard. A camada de áudio é atualmente fornecida pelo ALSA Audio .

Atualmente, ambos os aplicativos registram a partir de hw: 0,0 e eles interagem. Então, se eu iniciar o Darkice Client, meu Script Python não terá acesso e vice-verca.

O Ouput do meu arecord -L :

null
Discard all samples (playback) or generate zero samples (capture)
default
sysdefault:CARD=sun4icodec
    sun4i-CODEC, sun4i PCM
    Default Audio Device
dmix:CARD=sun4icodec,DEV=0
    sun4i-CODEC, sun4i PCM
    Direct sample mixing device
dsnoop:CARD=sun4icodec,DEV=0
    sun4i-CODEC, sun4i PCM
    Direct sample snooping device
hw:CARD=sun4icodec,DEV=0
    sun4i-CODEC, sun4i PCM
    Direct hardware device without any conversions
plughw:CARD=sun4icodec,DEV=0
    sun4i-CODEC, sun4i PCM
    Hardware device with all software conversions

Esta é minha amixer Saída:

imple mixer control 'Master',0
  Capabilities: pvolume pvolume-joined penum
  Playback channels: Mono
  Limits: Playback 0 - 63
  Mono: Playback 63 [100%]
Simple mixer control 'LineL',0
  Capabilities: pswitch pswitch-joined penum
  Playback channels: Mono
  Mono: Playback [off]
Simple mixer control 'LineR',0
  Capabilities: pswitch pswitch-joined penum
  Playback channels: Mono
  Mono: Playback [off]
Simple mixer control 'Mic Input Mux',0
  Capabilities: volume volume-joined penum
  Playback channels: Mono
  Capture channels: Mono
  Limits: 0 - 15
  Mono: 15 [100%]
Simple mixer control 'MicL',0
  Capabilities: volume volume-joined penum
  Playback channels: Mono
  Capture channels: Mono
  Limits: 0 - 3
  Mono: 1 [33%]
Simple mixer control 'MicR',0
  Capabilities: volume volume-joined penum
  Playback channels: Mono
  Capture channels: Mono
  Limits: 0 - 3
  Mono: 3 [100%]
Simple mixer control 'Playback',0
  Capabilities: pswitch pswitch-joined penum
  Playback channels: Mono
  Mono: Playback [off]
Simple mixer control 'Capture',0
  Capabilities: cvolume cvolume-joined penum
  Capture channels: Mono
  Limits: Capture 0 - 7
  Mono: Capture 7 [100%]
Simple mixer control 'ADC Input Mux',0
  Capabilities: volume volume-joined penum
  Playback channels: Mono
  Capture channels: Mono
  Limits: 0 - 7
  Mono: 7 [100%]
Simple mixer control 'Fm',0
  Capabilities: volume volume-joined penum
  Playback channels: Mono
  Capture channels: Mono
  Limits: 0 - 7
  Mono: 7 [100%]
Simple mixer control 'FmL',0
  Capabilities: pswitch pswitch-joined penum
  Playback channels: Mono
  Mono: Playback [off]
Simple mixer control 'FmR',0
  Capabilities: pswitch pswitch-joined penum
  Playback channels: Mono
  Mono: Playback [off]
Simple mixer control 'Ldac Left Mixer',0
  Capabilities: pswitch pswitch-joined penum
  Playback channels: Mono
  Mono: Playback [off]
Simple mixer control 'Ldac Right Mixer',0
  Capabilities: pswitch pswitch-joined penum
  Playback channels: Mono
  Mono: Playback [off]
Simple mixer control 'Rdac Right Mixer',0
  Capabilities: pswitch pswitch-joined penum
  Playback channels: Mono
  Mono: Playback [off]

Então, qual é a melhor solução para resolver este problema? Dividindo a entrada estéreo em dois decices diferentes? Use outra camada de áudio? Eu não sei!

Obrigado antecipadamente,

~ MxAgent