Khadas Tone Board

[jonners]

Any thoughts about this board? Does anyone have any experience of it?
https://www.khadas.com/tone

[DRONE7]

Some discussion over at DIYAudio...
https://www.diyaudio.com/forums/digital-...11640.html

[jonners]

Thanks for the link. It looks interesting.

[liv_s]

I made an Moode player using Rpi 3+ and KTB. The project is not complete, but I did some tests with this DAC (with last firmware). For now I notice noise when hdmi cable is used (ground issue) and most important Moode did not detect the board, I have to set-up as USB DAC board, but in this case no hardware volume control.
I did some tests with Volumio, and for this the correct board was detected and hardware volume was available.
Could be a kernel issue?

[Tim Curtis]

Post the output from the commands below and I'll have a look.

Code:

amixer -c0 scontrols
amixer -c1 scontrols

[liv_s]

Thanks Tim, see below:
pi@moode:~ $ amixer -c0 scontrols
Simple mixer control 'PCM',0

pi@moode:~ $ amixer -c1 scontrols
Simple mixer control 'Khadas Tone Control ',0
Simple mixer control 'Khadas Tone Control ',1
Simple mixer control 'XMOS Internal Clock Validity',0

[Tim Curtis]

Ok thanks.

Post output from cmd below to see if any of the simple mixer controls are volume.

Code:

amixer -c1

[liv_s]

pi@moode:~ $ amixer -c1
Simple mixer control 'Khadas Tone Control ',0
Capabilities: pvolume pswitch
Playback channels: Front Left - Front Right
Limits: Playback 0 - 127
Mono:
Front Left: Playback 127 [100%] [0.00dB] [on]
Front Right: Playback 127 [100%] [0.00dB] [on]
Simple mixer control 'Khadas Tone Control ',1
Capabilities: pvolume pvolume-joined pswitch pswitch-joined
Playback channels: Mono
Limits: Playback 0 - 127
Mono: Playback 127 [100%] [0.00dB] [on]
Simple mixer control 'XMOS Internal Clock Validity',0
Capabilities: pswitch pswitch-joined
Playback channels: Mono
Mono: Playback [on]

[Tim Curtis]

Below are the moOde commands that would determine the mixer name and whether the device supports hardware volume.  
The first command should return the device name. The second command should return a list of the simple mixer controls. The last command should return a volume %.

Code:

cat /proc/asound/card1/id
/var/www/command/util.sh get-mixername
/var/www/command/util.sh get-alsavol "Khadas Tone Control "

[liv_s]

Tim, thanks for your time.
Response to commands below. It is was you expected?

pi@moode:~ $ cat /proc/asound/card1/id
Control
pi@moode:~ $ /var/www/command/util.sh get-mixername
Khadas Tone Control
Khadas Tone Control
XMOS Internal Clock Validity
pi@moode:~ $ /var/www/command/util.sh get-alsavol "Khadas Tone Control "
100%