To find multi channel no. in audio injector octa sound card for raspberrypi3

[namanorai]

Hello Sir,

I am using audio injector octo sound card but I am not identify different channel no.....Please tell me how to find it?

When I run the command multiple time it's output channel automatically changed....how to control it?

Thanks

[flatmax]

Can you please copy how you run the sound through the system here ? If it is synchronous, then the channels do not swap.

Matt

[namanorai]

Hiii,

How to use stereo in this card. I am unable to record from ADC2, ADC3 and also tell me how to control amixer in stereo case. There is a option like that
numid=16,iface=MIXER,name='ADC High-Pass Filter Switch'
numid=24,iface=MIXER,name='ADC Single Volume Control Switch'
numid=25,iface=MIXER,name='ADC Soft Ramp & Zero Cross Control Switch'
numid=8,iface=MIXER,name='ADC1 Capture Volume'
numid=14,iface=MIXER,name='ADC1 Invert Switch'
numid=18,iface=MIXER,name='ADC1 Single Ended Mode Switch'
numid=9,iface=MIXER,name='ADC2 Capture Volume'
numid=15,iface=MIXER,name='ADC2 Invert Switch'
numid=19,iface=MIXER,name='ADC2 Single Ended Mode Switch'
numid=1,iface=MIXER,name='ADC3 Capture Volume'
numid=2,iface=MIXER,name='ADC3 Invert Switch'
numid=3,iface=MIXER,name='ADC3 Single Ended Mode Switch'
numid=22,iface=MIXER,name='DAC Auto Mute Switch'
numid=17,iface=MIXER,name='DAC De-emphasis Switch'
numid=20,iface=MIXER,name='DAC Single Volume Control Switch'
numid=21,iface=MIXER,name='DAC Soft Ramp & Zero Cross Control Switch'
numid=10,iface=MIXER,name='DAC1 Invert Switch'
numid=4,iface=MIXER,name='DAC1 Playback Volume'
numid=11,iface=MIXER,name='DAC2 Invert Switch'
numid=5,iface=MIXER,name='DAC2 Playback Volume'
numid=12,iface=MIXER,name='DAC3 Invert Switch'
numid=6,iface=MIXER,name='DAC3 Playback Volume'
numid=13,iface=MIXER,name='DAC4 Invert Switch'
numid=7,iface=MIXER,name='DAC4 Playback Volume'
numid=23,iface=MIXER,name='Mute ADC Serial Port Switch'

and also like that
Simple mixer control 'ADC High-Pass Filter',0
Capabilities: pswitch pswitch-joined
Playback channels: Mono
Mono: Playback [on]
Simple mixer control 'ADC Soft Ramp & Zero Cross Control',0
Capabilities: enum
Items: 'Immediate Change' 'Zero Cross' 'Soft Ramp' 'Soft Ramp on Zero Cross'
Item0: 'Immediate Change'
Simple mixer control 'ADC1',0
Capabilities: cvolume
Capture channels: Front Left - Front Right
Limits: Capture 0 - 176
Front Left: Capture 176 [100%] [24.00dB]
Front Right: Capture 176 [100%] [24.00dB]
Simple mixer control 'ADC1 Invert',0
Capabilities: pswitch
Playback channels: Front Left - Front Right
Mono:
Front Left: Playback [off]
Front Right: Playback [off]
Simple mixer control 'ADC1 Single Ended Mode',0
Capabilities: enum
Items: 'Differential' 'Single-Ended'
Item0: 'Differential'
Simple mixer control 'ADC2',0
Capabilities: cvolume
Capture channels: Front Left - Front Right
Limits: Capture 0 - 176
Front Left: Capture 176 [100%] [24.00dB]
Front Right: Capture 176 [100%] [24.00dB]
Simple mixer control 'ADC2 Invert',0
Capabilities: pswitch
Playback channels: Front Left - Front Right
Mono:
Front Left: Playback [off]
Front Right: Playback [off]
Simple mixer control 'ADC2 Single Ended Mode',0
Capabilities: enum
Items: 'Differential' 'Single-Ended'
Item0: 'Differential'
Simple mixer control 'ADC3',0
Capabilities: cvolume
Capture channels: Front Left - Front Right
Limits: Capture 0 - 176
Front Left: Capture 176 [100%] [24.00dB]
Front Right: Capture 176 [100%] [24.00dB]
Simple mixer control 'ADC3 Invert',0
Capabilities: pswitch
Playback channels: Front Left - Front Right
Mono:
Front Left: Playback [off]
Front Right: Playback [off]
Simple mixer control 'ADC3 Single Ended Mode',0
Capabilities: enum
Items: 'Differential' 'Single-Ended'
Item0: 'Differential'
Simple mixer control 'DAC Auto Mute',0
Capabilities: pswitch pswitch-joined
Playback channels: Mono
Mono: Playback [off]
Simple mixer control 'DAC De-emphasis',0
Capabilities: pswitch pswitch-joined
Playback channels: Mono
Mono: Playback [on]
Simple mixer control 'DAC Soft Ramp & Zero Cross Control',0
Capabilities: enum
Items: 'Immediate Change' 'Zero Cross' 'Soft Ramp' 'Soft Ramp on Zero Cross'
Item0: 'Immediate Change'
Simple mixer control 'DAC1',0
Capabilities: pvolume
Playback channels: Front Left - Front Right
Limits: Playback 0 - 255
Mono:
Front Left: Playback 0 [0%] [-99999.99dB]
Front Right: Playback 5 [2%] [-125.00dB]
Simple mixer control 'DAC1 Invert',0
Capabilities: pswitch
Playback channels: Front Left - Front Right
Mono:
Front Left: Playback [off]
Front Right: Playback [off]
Simple mixer control 'DAC2',0
Capabilities: pvolume
Playback channels: Front Left - Front Right
Limits: Playback 0 - 255
Mono:
Front Left: Playback 255 [100%] [0.00dB]
Front Right: Playback 255 [100%] [0.00dB]
Simple mixer control 'DAC2 Invert',0
Capabilities: pswitch
Playback channels: Front Left - Front Right
Mono:
Front Left: Playback [off]
Front Right: Playback [off]
Simple mixer control 'DAC3',0
Capabilities: pvolume
Playback channels: Front Left - Front Right
Limits: Playback 0 - 255
Mono:
Front Left: Playback 255 [100%] [0.00dB]
Front Right: Playback 255 [100%] [0.00dB]
Simple mixer control 'DAC3 Invert',0
Capabilities: pswitch
Playback channels: Front Left - Front Right
Mono:
Front Left: Playback [off]
Front Right: Playback [off]
Simple mixer control 'DAC4',0
Capabilities: pvolume
Playback channels: Front Left - Front Right
Limits: Playback 0 - 255
Mono:
Front Left: Playback 255 [100%] [0.00dB]
Front Right: Playback 255 [100%] [0.00dB]
Simple mixer control 'DAC4 Invert',0
Capabilities: pswitch
Playback channels: Front Left - Front Right
Mono:
Front Left: Playback [off]
Front Right: Playback [off]
Simple mixer control 'Mute ADC Serial Port',0
Capabilities: pswitch pswitch-joined
Playback channels: Mono
Mono: Playback [off]

I am unable to switch stereo.

arecord -f S16_LE -r 44100 -V stereo -c2 -D plughw:2 test1.wav