# How do I play a simple audio file from the cmd line?
**URL:** https://mangoh.discourse.group/t/how-do-i-play-a-simple-audio-file-from-the-cmd-line/4130
**Category:** mangOH Red
**Created:** [March 24, 2020, 3:48pm UTC](https://mangoh.discourse.group/t/how-do-i-play-a-simple-audio-file-from-the-cmd-line/4130 "2020-03-24T15:48:35Z")
**Posts on this page:** 18
**Page:** 1
### Author:  [@sciscitatio](https://mangoh.discourse.group/u/sciscitatio)
#### Post date: [March 24, 2020, 3:48pm UTC](https://mangoh.discourse.group/t/how-do-i-play-a-simple-audio-file-from-the-cmd-line/4130/1 "2020-03-24T15:48:36Z")
A simple enough task you would think. How do I play a wav file from the command line?
aplay myfile.wav returns the following
aplay: Playing ‘myfile.wav’:Signed 16 bit Little Endian
buffer\_bytes = (1024,1024) omin=0 omax=0 int=1 empty=0
period\_bytes = (128,128) omin=0 omax=0 int=1 empty=0
cannot prepare channel: errno =-22
Aplay:Failed in pcm\_prepare
Note I only want to do this from CLI. I am **NOT** a software developer, I’m just trying to check out some magoh red boards before sending them off to my software developer.
Our final objective is to play audio from out custom linux application (won’t be using legato platform)
> cm info all
> Device: WP7607
> IMEI: 359779080143064
> IMEISV: 5
> FSN: VN851171271310
> Firmware Version: SWI9X07Y\_02.18.05.00 000000 jenkins 2018/07/19 17:40:21
> Bootloader Version: SWI9X07Y\_02.18.05.00 000000 jenkins 2018/07/19 17:40:21
> MCU Version: 002.009
> PRI Part Number (PN): 9908767
> PRI Revision: 001.001
> Carrier PRI Name: GENERIC
> Carrier PRI Revision: 002.041\_000
> SKU: 1104218
> Last Reset Cause: Power Down
> Resets Count: Expected: 15 Unexpected: 0
---
### Author:  [@jyijyi](https://mangoh.discourse.group/u/jyijyi)
#### Post date: [March 25, 2020, 1:54am UTC](https://mangoh.discourse.group/t/how-do-i-play-a-simple-audio-file-from-the-cmd-line/4130/2 "2020-03-25T01:54:10Z")
you can use the sample app audioPlaybackRec :
app runProc audioPlaybackRec audioPlaybackRecTest --exe=audioPlaybackRecTest – PB\_SAMPLES MIC /usr/share/sounds/0-to-9.wav 1 8000 16
---
### Author:  [@sciscitatio](https://mangoh.discourse.group/u/sciscitatio)
#### Post date: [March 25, 2020, 11:30am UTC](https://mangoh.discourse.group/t/how-do-i-play-a-simple-audio-file-from-the-cmd-line/4130/3 "2020-03-25T11:30:03Z")
Nope that doesn’t work, and the error doesn’t really help much.
> app runProc audioPlaybackRec audioPlaybackRecTest --exe=audioPlaybackRecTest - PB\_SAMPLES MIC /home/root/test.wav 1 8000 16
> Invalid arguments. Try --help.
I know I’ve used aplay on another board some while ago, so why isn’t this one working?
---
### Author:  [@jyijyi](https://mangoh.discourse.group/u/jyijyi)
#### Post date: [March 25, 2020, 12:03pm UTC](https://mangoh.discourse.group/t/how-do-i-play-a-simple-audio-file-from-the-cmd-line/4130/4 "2020-03-25T12:03:26Z")
how about using AT command?
at!avcfg=5,1,2
AT!AVSETPROFILE=5
AT!AVAUDIO=1,1,/home/root/0-to-9\_8k.wav
---
### Author:  [@jyijyi](https://mangoh.discourse.group/u/jyijyi)
#### Post date: [March 25, 2020, 12:06pm UTC](https://mangoh.discourse.group/t/how-do-i-play-a-simple-audio-file-from-the-cmd-line/4130/5 "2020-03-25T12:06:38Z")
i remember i try on WP76 R9, it is working fine for aplay:
For WP76 R9:
amix ‘PRI\_RX Audio Mixer MultiMedia1’ 1
amix ‘Sys Clock Enable Switch’ 1
amix ‘Capture PGA Mute Switch’ 1
amix ‘Digital Playback Mute Switch’ 1
amix ‘Digital Playback Volume’ 192
amix ‘Speaker Playback Volume’ 57
amix ‘Speaker Playback Mute Switch’ 1
amix ‘SPKOUTP VDD Enable Switch’ 1
amix ‘SPKOUTN VDD Enable Switch’ 1
amix ‘SPKOUTP Mute Switch’ 1
amix ‘SPKOUTN Mute Switch’ 1
amix ‘SPKOUTP Enable Switch’ 1
amix ‘SPKOUTN Enable Switch’ 1
amix ‘ADC Mute All Switch’ 1
amix ‘Speaker Function’ 1
amix ‘SPKOUTP Mixer Speak PGA to Speaker P Switch’ 1
amix ‘SPKOUTN Mixer Speak PGA to Speaker N Switch’ 1
amix ‘Speaker Mixer DAC to Speak PGA Switch’ 1
amix ‘MultiMedia1 Mixer PRI\_TX’ 1
amix ‘Input PGA Enable Switch’ 1
amix ‘Left ADC Enable Switch’ 1
amix ‘Input PGA AUX to Invert InPGA Switch’ 1
amix ‘Input PGA IN1 to InPGA Switch’ 1
amix ‘PRI\_MI2S\_RX Audio Mixer MultiMedia1’ 1
aplay 0-to-9\_8k.wav
---
### Author:  [@sciscitatio](https://mangoh.discourse.group/u/sciscitatio)
#### Post date: [March 26, 2020, 12:31pm UTC](https://mangoh.discourse.group/t/how-do-i-play-a-simple-audio-file-from-the-cmd-line/4130/6 "2020-03-26T12:31:47Z")
Strangely enough, I tried the AT!AVAUDIO method and it played the file. I then tried again using aplay and it worked. This is consistent: aplay will only work if I microcom to /dev/ttyAT and use the AT!AVAUDIO command.
The amix commands don’t work, they just report “control not found”
This helps me to test the hardware - but it is obviously going to make things messy to play audio files from a custom Linux program. So what exactly is the missing part here, what did the AT command do exactly to make it work?
Or, to put it another way, what is the correct procedure to play audio from a custom Linux application?
Thanks
---
### Author:  [@jyijyi](https://mangoh.discourse.group/u/jyijyi)
#### Post date: [March 26, 2020, 4:11pm UTC](https://mangoh.discourse.group/t/how-do-i-play-a-simple-audio-file-from-the-cmd-line/4130/7 "2020-03-26T16:11:48Z")
You can send AT command within the app
---
### Author:  [@sciscitatio](https://mangoh.discourse.group/u/sciscitatio)
#### Post date: [March 30, 2020, 8:04am UTC](https://mangoh.discourse.group/t/how-do-i-play-a-simple-audio-file-from-the-cmd-line/4130/8 "2020-03-30T08:04:53Z")
Yes I know that, but I would like to know what is the AT command doing that makes it work?
We may not be only playing files (e.g. using a text-to-speech library) so may want to output to the sound device directly. Also, we will need to control the mixer settings to allow separate left/right balance.
Also, I plan to use a different codec IC. How would that affect the operation of the built-in AT command for playing / volume adjustment?
Thanks
---
### Author:  [@jyijyi](https://mangoh.discourse.group/u/jyijyi)
#### Post date: [March 30, 2020, 10:45am UTC](https://mangoh.discourse.group/t/how-do-i-play-a-simple-audio-file-from-the-cmd-line/4130/9 "2020-03-30T10:45:13Z")
Didn’t you say “aplay will only work if I microcom to /dev/ttyAT and use the AT!AVAUDIO command”?
You can play a dummy file after power on.
After that you can use aplay.
---
### Author:  [@sciscitatio](https://mangoh.discourse.group/u/sciscitatio)
#### Post date: [March 30, 2020, 1:37pm UTC](https://mangoh.discourse.group/t/how-do-i-play-a-simple-audio-file-from-the-cmd-line/4130/10 "2020-03-30T13:37:30Z")
I know, but that really is a bodge. I would like to know **WHY** , so I can make sure that it will always work, in all circumstances and preferably for future revisions of hardware & firmware. It’s asking for trouble relying on some obscure undocumented artifact of a some function.
I also need the mixer to set left & right volume but that doesn’t seem to work either.
This will be used for a commercial product, so I need a consistent & reliable operation.
---
### Author:  [@jyijyi](https://mangoh.discourse.group/u/jyijyi)
#### Post date: [March 30, 2020, 2:43pm UTC](https://mangoh.discourse.group/t/how-do-i-play-a-simple-audio-file-from-the-cmd-line/4130/11 "2020-03-30T14:43:56Z")
Can you try R9?
I remember it was working fine for aplay
Also be careful of the single quote character
You can also compre the amix before and after those AT command.
> **[\[solved\] Cannot find pa\_audio\_default with meaningful content](https://forum.legato.io/t/solved-cannot-find-pa-audio-default-with-meaningful-content/3420/5)**
>
> I have tried sending a message to the guy stating that he have gotten it to work as I am very reluctant in waking up dead threads to ask for an out of topic question. But I would like to get his attention non-the-less
---
### Author:  [@sciscitatio](https://mangoh.discourse.group/u/sciscitatio)
#### Post date: [March 31, 2020, 12:39pm UTC](https://mangoh.discourse.group/t/how-do-i-play-a-simple-audio-file-from-the-cmd-line/4130/12 "2020-03-31T12:39:52Z")
Er, I **am** using R9!
There is something seriously half-assed about this software platform. amix before & after yeilds exactly the same (which incidentally exposes something else broken - the redirect \> doesn’t work so I had to use PuTTY logging to capture the output), I won’t post the output here as it’s 1600 lines ling.
This is what I enter from the cmd line
```
root@swi-mdm9x28-wp:~# aplay ready.wav
aplay: Playing 'ready.wav':Signed 16 bit Little Endian
buffer_bytes = (1024,1024) omin=0 omax=0 int=1 empty=0
period_bytes = (128,128) omin=0 omax=0 int=1 empty=0
cannot prepare channel: errno =-22
Aplay:Failed in pcm_prepare
microcom /dev/ttyAT
AT!AVAUDIO=1,1,/home/root/ready.wav
OK
root@swi-mdm9x28-wp:~# aplay ready.wav
aplay: Playing 'ready.wav':Signed 16 bit Little Endian
buffer_bytes = (1024,1024) omin=0 omax=0 int=1 empty=0
period_bytes = (128,128) omin=0 omax=0 int=1 empty=0
Aplay: Done playing
```
So in the absence of anything helpful, let’s start with the error message. What does errno -22 mean?
---
### Author:  [@sciscitatio](https://mangoh.discourse.group/u/sciscitatio)
#### Post date: [March 31, 2020, 3:29pm UTC](https://mangoh.discourse.group/t/how-do-i-play-a-simple-audio-file-from-the-cmd-line/4130/13 "2020-03-31T15:29:56Z")
Maybe this will help: this is the output from dmesg after each stage:
aplay attempt - fail
[105.398240] MDM Media1: ASoC: no backend DAIs enabled for MDM Media1
[105.402660] q6asm\_callback: cmd = 0x10bcd returned error = 0x1
[105.402741] \_\_q6asm\_cmd: DSP returned error[ADSP\_EFAILED] opcode 68557
[105.398240] MDM Media1: ASoC: no backend DAIs enabled for MDM Media1
[105.402660] q6asm\_callback: cmd = 0x10bcd returned error = 0x1
[105.402741] \_\_q6asm\_cmd: DSP returned error[ADSP\_EFAILED] opcode 68557
[121.121063] sierra\_startup\_monitor
[150.685702] MDM Media1: ASoC: no backend DAIs enabled for MDM Media1
[150.689626] q6asm\_callback: cmd = 0x10bcd returned error = 0x1
[150.689710] \_\_q6asm\_cmd: DSP returned error[ADSP\_EFAILED] opcode 68557
AT command play - works
[194.027962] afe\_send\_custom\_topology\_block: AFE SVC cal has invalid size: 0!
[194.027990] afe\_send\_custom\_topology: No cal sent for cal\_index 7! ret -22
[194.028006] afe\_get\_cal\_topology\_id: [AFE\_TOPOLOGY\_CAL] not initialized for this port 4096
[194.046531] q6asm\_callback: cmd = 0x10da1 returned error = 0x3
[194.046615] q6asm\_send\_cal: DSP returned error[3] audio audstrm cal send
[194.054185] adm\_callback: cmd = 0x10328 returned error = 0x3
[194.054257] send\_adm\_cal\_block: DSP returned error[ADSP\_EUNSUPPORTED]
[194.614128] aplay (1773) used greatest stack depth: 4520 bytes left
aplay command - works
[234.309229] afe\_get\_cal\_topology\_id: [AFE\_TOPOLOGY\_CAL] not initialized for this port 4096
[234.321106] q6asm\_callback: cmd = 0x10da1 returned error = 0x3
[234.321169] q6asm\_send\_cal: DSP returned error[3] audio audstrm cal send
[234.325585] adm\_callback: cmd = 0x10328 returned error = 0x3
[234.325637] send\_adm\_cal\_block: DSP returned error[ADSP\_EUNSUPPORTED]
---
### Author:  [@jyijyi](https://mangoh.discourse.group/u/jyijyi)
#### Post date: [May 5, 2020, 5:11am UTC](https://mangoh.discourse.group/t/how-do-i-play-a-simple-audio-file-from-the-cmd-line/4130/14 "2020-05-05T05:11:40Z")
I don’t see problem on my WP7607 module even no AT command:
root@swi-mdm9x28-wp:~# amix ‘PRI\_RX Audio Mixer MultiMedia1’ 1
root@swi-mdm9x28-wp:~# amix ‘Sys Clock Enable Switch’ 1
root@swi-mdm9x28-wp:~# amix ‘Capture PGA Mute Switch’ 1
root@swi-mdm9x28-wp:~# amix ‘Digital Playback Mute Switch’ 1
root@swi-mdm9x28-wp:~# amix ‘Digital Playback Volume’ 192
capability: volume
dBscale- min=-72.00dB step=0.37dB max=2.55dB mute=1
min = ffffe3e0 max = ffval = c0Value = 1.92dB
root@swi-mdm9x28-wp:~# amix ‘Speaker Playback Volume’ 57
capability: volume
dBscale- min=-57.00dB step=1.00dB max=0.63dB mute=0
min = ffffe9bc max = 3fval = 39Value = 0.57dB
root@swi-mdm9x28-wp:~# amix ‘Speaker Playback Mute Switch’ 1
root@swi-mdm9x28-wp:~# amix ‘SPKOUTP VDD Enable Switch’ 1
root@swi-mdm9x28-wp:~# amix ‘SPKOUTN VDD Enable Switch’ 1
root@swi-mdm9x28-wp:~# amix ‘SPKOUTP Mute Switch’ 1
root@swi-mdm9x28-wp:~# amix ‘SPKOUTN Mute Switch’ 1
root@swi-mdm9x28-wp:~# amix ‘SPKOUTP Enable Switch’ 1
root@swi-mdm9x28-wp:~# amix ‘SPKOUTN Enable Switch’ 1
root@swi-mdm9x28-wp:~# amix ‘ADC Mute All Switch’ 1
root@swi-mdm9x28-wp:~# amix ‘Speaker Function’ 1
Value: 1 idx:0
[66.043157] wm8944-codec wm8944-codec: ASoC: DAPM unknown pin Ext Spk Bottom Pos
[66.050604] wm8944-codec wm8944-codec: ASoC: DAPM unknown pin Ext Spk Bottom Neg
[66.057830] wm8944-codec wm8944-codec: ASoC: DAPM unknown pin Ext Spk Top Pos
[66.065434] wm8944-codec wm8944-codec: ASoC: DAPM unknown pin Ext Spk Top Neg
root@swi-mdm9x28-wp:~# amix ‘SPKOUTP Mixer Speak PGA to Speaker P Switch’ 1
root@swi-mdm9x28-wp:~# amix ‘SPKOUTN Mixer Speak PGA to Speaker N Switch’ 1
root@swi-mdm9x28-wp:~# amix ‘Speaker Mixer DAC to Speak PGA Switch’ 1
root@swi-mdm9x28-wp:~# amix ‘MultiMedia1 Mixer PRI\_TX’ 1
root@swi-mdm9x28-wp:~# amix ‘Input PGA Enable Switch’ 1
root@swi-mdm9x28-wp:~# amix ‘Left ADC Enable Switch’ 1
root@swi-mdm9x28-wp:~# amix ‘Input PGA AUX to Invert InPGA Switch’ 1
root@swi-mdm9x28-wp:~# amix ‘Input PGA IN1 to InPGA Switch’ 1
Value: 1 idx:0
root@swi-mdm9x28-wp:~# amix ‘PRI\_MI2S\_RX Audio Mixer MultiMedia1’ 1
root@swi-mdm9x28-wp:~# aplay ./0-to-9.wav
aplay: Playing ‘./0-to-9.wav’:Signed 16 bit Little Endian
buffer\_bytes = (1024,1024) omin=0 omax=0 int=1 empty=0
period\_bytes = (128,128) omin=0 omax=0 int=1 empty=0
[94.597620] afe\_send\_custom\_topology\_block: AFE SVC cal has invalid size: 0!
[94.603809] afe\_send\_custom\_topology: No cal sent for cal\_index 7! ret -22
[94.611093] afe\_get\_cal\_topology\_id: [AFE\_TOPOLOGY\_CAL] not initialized for this port 4096
[94.640234] q6asm\_callback: cmd = 0x10da1 returned error = 0x3
[94.645162] q6asm\_send\_cal: DSP returned error[3] audio audstrm cal send
[94.662618] adm\_callback: cmd = 0x10328 returned error = 0x3
[94.667332] send\_adm\_cal\_block: DSP returned error[ADSP\_EUNSUPPORTED]
Aplay: Done playing
[100.715822] BUG: sleeping function called from invalid context at /usr/src/kernel/kernel/locking/mutex.c:97
[100.724533] in\_atomic(): 0, irqs\_disabled(): 128, pid: 1759, name: aplay
root@swi-mdm9x28-wp:~# pwd
/home/root
root@swi-mdm9x28-wp:~# cm info
Device: WP7607
IMEI: 359779081234565
IMEISV: 6
FSN: VN730485080103
Firmware Version: SWI9X07Y\_02.28.03.05 000000 jenkins 2019/07/08 11:04:16
Bootloader Version: SWI9X07Y\_[134.606893] i2c-msm-v2 78b8000.i2c: NACK: slave not responding, ensure its powered: msgs(n:1 cur:0 tx) bc(rx:0 tx:2) mode:FIFO slv\_addr:0x3a MSTR\_STS:0x0c1300c8 OPER:0x00000090
02.28.03.05 000000 jenkins 2019/07/08 11:04:16
[134.628097] i2c-msm-v2 78b8000.i2c: NACK: slave not responding, ensure its powered: msgs(n:1 cur:0 tx) bc(rx:0 tx:2) mode:FIFO slv\_addr:0x3a MSTR\_STS:0x0c1300c8 OPER:0x00000090
MCU Version: 002.011
PRI Part Number (PN): 9908958
PRI Revision: 001.000
Carrier PRI Name: GENERIC
Carrier PRI Revision: 002.073\_000
SKU: 1104301
Last Reset Cause: Reset, User Requested
Resets Count: Expected: 101 Unexpected: 3
root@swi-mdm9x28-wp:~#
---
### Author:  [@raghavasanikam](https://mangoh.discourse.group/u/raghavasanikam)
#### Post date: [June 16, 2021, 12:32pm UTC](https://mangoh.discourse.group/t/how-do-i-play-a-simple-audio-file-from-the-cmd-line/4130/15 "2021-06-16T12:32:56Z")
Do you guys have any solution for this ? I have exactly the same problem on mangOH red with wp7608.
---
### Author:  [@jyijyi](https://mangoh.discourse.group/u/jyijyi)
#### Post date: [June 16, 2021, 12:35pm UTC](https://mangoh.discourse.group/t/how-do-i-play-a-simple-audio-file-from-the-cmd-line/4130/16 "2021-06-16T12:35:31Z")
how about using AT command?
at!avcfg=5,1,2
AT!AVSETPROFILE=5
AT!AVAUDIO=1,1,/home/root/0-to-9\_8k.wav
---
### Author:  [@raghavasanikam](https://mangoh.discourse.group/u/raghavasanikam)
#### Post date: [June 16, 2021, 1:31pm UTC](https://mangoh.discourse.group/t/how-do-i-play-a-simple-audio-file-from-the-cmd-line/4130/17 "2021-06-16T13:31:44Z")
AT Command playback works. I do not want to use AT commands for my application use case. I need to read and write samples from/to mic locally for a VoIP application.
---
### Author:  [@jyijyi](https://mangoh.discourse.group/u/jyijyi)
#### Post date: [June 16, 2021, 2:44pm UTC](https://mangoh.discourse.group/t/how-do-i-play-a-simple-audio-file-from-the-cmd-line/4130/18 "2021-06-16T14:44:36Z")
How about the sample app audioPlaybackRec :
app runProc audioPlaybackRec audioPlaybackRecTest --exe=audioPlaybackRecTest – PB\_SAMPLES MIC /usr/share/sounds/0-to-9.wav 1 8000 16