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maximtrp / spectrumLED

Spectrum analyzer on a LED matrix :sound:

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USB DAC and device OUT

betojsp opened this issue · comments

commented

Hi @maximtrp.
I am configuring Raspotify + SpectrumLED but I am not detecting the device out.

$ aplay -l
**** List of PLAYBACK Hardware Devices ****
card 0: Loopback [Loopback], device 0: Loopback PCM [Loopback PCM]
  Subdevices: 8/8
  Subdevice #0: subdevice #0
  Subdevice #1: subdevice #1
  Subdevice #2: subdevice #2
  Subdevice #3: subdevice #3
  Subdevice #4: subdevice #4
  Subdevice #5: subdevice #5
  Subdevice #6: subdevice #6
  Subdevice #7: subdevice #7
card 0: Loopback [Loopback], device 1: Loopback PCM [Loopback PCM]
  Subdevices: 8/8
  Subdevice #0: subdevice #0
  Subdevice #1: subdevice #1
  Subdevice #2: subdevice #2
  Subdevice #3: subdevice #3
  Subdevice #4: subdevice #4
  Subdevice #5: subdevice #5
  Subdevice #6: subdevice #6
  Subdevice #7: subdevice #7
card 1: VX1 [VX1], device 0: USB Audio [USB Audio]
  Subdevices: 0/1
  Subdevice #0: subdevice #0

asound.conf

pcm.!default {
	type plug
	playback.pcm "out"
	capture.pcm "loopin"
}

pcm.out {
    type plug
    slave.pcm {
        type multi
        slaves {
            a { channels 2 pcm "output" }
            b { channels 2 pcm "loopout" }
        }
        bindings {
            0 { slave a channel 0 }
            1 { slave a channel 1 }
            2 { slave b channel 0 }
            3 { slave b channel 1 }
        }
    }
    ttable [
        [ 1 0 1 0 ]   # left  -> a.left,  b.left
        [ 0 1 0 1 ]   # right -> a.right, b.right
    ]
}

pcm.loopout {
    type dmix
	ipc_key 1025
	slave.pcm "hw:0,0,0"
    slave {
        period_time 0
        period_size 1024
        buffer_size 8192
        channels 2
    }
    bindings {
        0 0
        1 1
    }
}

pcm.loopin {
    type plug
	slave.pcm "hw:0,1,0"
}

pcm.output {
	type dmix
	ipc_key 1024
	slave.pcm "hw:1,0"
    slave {
        period_time 0
        period_size 1024
        buffer_size 16384
        channels 2
    }
    bindings {
        0 0
        1 1
    }
}

With librepot I can detect the available devices, but it is not out.

$  librespot --name cubex --backend alsa --device ?

[2020-04-23T20:01:03Z INFO  librespot] librespot (raspotify v0.14.0) 3672214 (2020-01-30). Built on 2020-02-16. Build ID: 7pZDdYUK
[2020-04-23T20:01:03Z INFO  librespot_playback::audio_backend::alsa] Using alsa sink
Listing available alsa outputs
pcm devices:
sysdefault:CARD=VX1
	VX1, USB Audio
	Default Audio Device

front:CARD=VX1,DEV=0
	VX1, USB Audio
	Front speakers

surround21:CARD=VX1,DEV=0
	VX1, USB Audio
	2.1 Surround output to Front and Subwoofer speakers

surround40:CARD=VX1,DEV=0
	VX1, USB Audio
	4.0 Surround output to Front and Rear speakers

surround41:CARD=VX1,DEV=0
	VX1, USB Audio
	4.1 Surround output to Front, Rear and Subwoofer speakers

surround50:CARD=VX1,DEV=0
	VX1, USB Audio
	5.0 Surround output to Front, Center and Rear speakers

surround51:CARD=VX1,DEV=0
	VX1, USB Audio
	5.1 Surround output to Front, Center, Rear and Subwoofer speakers

surround71:CARD=VX1,DEV=0
	VX1, USB Audio
	7.1 Surround output to Front, Center, Side, Rear and Woofer speakers

iec958:CARD=VX1,DEV=0
	VX1, USB Audio
	IEC958 (S/PDIF) Digital Audio Output

dmix:CARD=VX1,DEV=0
	VX1, USB Audio
	Direct sample mixing device

dsnoop:CARD=VX1,DEV=0
	VX1, USB Audio
	Direct sample snooping device

hw:CARD=VX1,DEV=0
	VX1, USB Audio
	Direct hardware device without any conversions

plughw:CARD=VX1,DEV=0
	VX1, USB Audio
	Hardware device with all software conversions

ctl devices:
hwdep devices:

What can be missing in my configuration?

commented

Hello! Sorry for a terrible delay! Could you please post the output of spectrumLED.py?

commented

Hello @maximtrp, This weekend I set everything up again and share the result. Thanks for the help, no problem for the delay.