# Ext. USB Sound Adapter connected to MangOH Board **URL:** \ **Category:** mangOH Green\ **Created:** [May 12, 2017, 1:54pm UTC](https://mangoh.discourse.group/t/ext-usb-sound-adapter-connected-to-mangoh-board/525 "2017-05-12T13:54:24Z")\ **Posts on this page:** 8\ **Page:** 1
**Author:** ![AE\_1](https://avatars.discourse-cdn.com/v4/letter/a/a88e57/32.png) [@AE\_1](https://mangoh.discourse.group/u/AE_1)\ **Post date:** [May 12, 2017, 1:54pm UTC](https://mangoh.discourse.group/t/ext-usb-sound-adapter-connected-to-mangoh-board/525/1 "2017-05-12T13:54:24Z")
Hallo everyone, I am testing DTMF and Voice Call playback on USB Sound Adapter which is connected to MangOH Board via USB Host. But it seems to not work. I don’t hear anything. Legato lists the usb sound card as below… root@swi-mdm9x15:~# cat /proc/asound/cards 0 [mdm9615nocodecs]: mdm9615-nocodec - mdm9615-nocodec-snd-card mdm9615-nocodec-snd-card 1 [USB]: USB-Audio - Jabra SPEAK 410 USB Jabra SPEAK 410 USB at usb-msm\_hsic\_host-1.3.2, full speed root@swi-mdm9x15:~# my source code… void DTMF\_ON\_USB(void) { le\_result\_t res = 0; const char b[10]= {‘1’, ‘2’,‘3’,‘4’,‘5’,‘6’,‘7’,‘8’,0}; FeOutRef = le\_audio\_OpenUsbTx() ; AudioRef = le\_audio\_OpenPlayer(); AudioOutputConnectorRef = le\_audio\_CreateConnector(); le\_audio\_Connect(AudioOutputConnectorRef, FeOutRef); le\_audio\_Connect(AudioOutputConnectorRef, AudioRef); res = le\_audio\_PlayDtmf(AudioRef ,b,500,500); LE\_INFO("######le\_audio\_PlayDtmf(): %d", res); } COMPONENT\_INIT { LE\_INFO("######DTMF On USB Speaker"); DTMF\_ON\_USB(); } What is wrong? ---
**Author:** ![AE\_1](https://avatars.discourse-cdn.com/v4/letter/a/a88e57/32.png) [@AE\_1](https://mangoh.discourse.group/u/AE_1)\ **Post date:** [May 31, 2017, 3:46pm UTC](https://mangoh.discourse.group/t/ext-usb-sound-adapter-connected-to-mangoh-board/525/2 "2017-05-31T15:46:07Z")
Hello All, anyone was successful to rout the voice call to an external device connected via USB on MangOH green board ? ![](https://us1.discourse-cdn.com/flex016/uploads/mangoh/original/1X/d72a5777d3dd78e8946e1d06587176ef2ebb78d0.png) ---
**Author:** ![Akshaysk](https://avatars.discourse-cdn.com/v4/letter/a/5f8ce5/32.png) [@Akshaysk](https://mangoh.discourse.group/u/Akshaysk)\ **Post date:** [August 11, 2020, 6:50am UTC](https://mangoh.discourse.group/t/ext-usb-sound-adapter-connected-to-mangoh-board/525/3 "2020-08-11T06:50:51Z")
Hi all , Has anyone achieved this ? If yes please let me know the method followed . Thanks & Regards - AK ---
**Author:** ![jyijyi](https://sea2.discourse-cdn.com/flex016/user_avatar/mangoh.discourse.group/jyijyi/32/997_2.png) [@jyijyi](https://mangoh.discourse.group/u/jyijyi)\ **Post date:** [August 11, 2020, 7:11am UTC](https://mangoh.discourse.group/t/ext-usb-sound-adapter-connected-to-mangoh-board/525/4 "2020-08-11T07:11:38Z")
here says the USB audio is working fine with WP76: > **[How to do USB audio playback on WP7607 modem](https://forum.sierrawireless.com/t/how-to-do-usb-audio-playback-on-wp7607-modem/16925/7)** > > @jyijyi Thanks for the reply. aplay and arecord is working for me too. I am still not able to figure out what is the problem with Audacity play. I tried choosing different sample rates in audacity still no success Regards Shatrughan ---
**Author:** ![Akshaysk](https://avatars.discourse-cdn.com/v4/letter/a/5f8ce5/32.png) [@Akshaysk](https://mangoh.discourse.group/u/Akshaysk)\ **Post date:** [August 12, 2020, 5:12am UTC](https://mangoh.discourse.group/t/ext-usb-sound-adapter-connected-to-mangoh-board/525/5 "2020-08-12T05:12:08Z")
Hi @jyijyi , After enabling the USB-Audio drivers . I tried playing a .wav file but I am experiencing below error messages . \*\*root@swi-mdm9x28-wp:~# aplay -D hw:1,0 CantinaBand60.wav \*\* **aplay: Playing ‘CantinaBand60.wav’:Signed 16 bit Little Endian** **Aplay:cannot set hw params** **Aplay:params setting failed** root@swi-mdm9x28-wp:~# cat /proc/asound/cards 0 [mdm9607wm8944i2]: mdm9607-wm8944- - mdm9607-wm8944-i2s-snd-card mdm9607-wm8944-i2s-snd-card 1 [Device]: USB-Audio - USB PnP Sound Device C-Media Electronics Inc. USB PnP Sound Device at usb-7c00000.hsic\_host-1.1, ful Any Idea what is missing ? Thanks & Regards -Akshay K ---
**Author:** ![jyijyi](https://sea2.discourse-cdn.com/flex016/user_avatar/mangoh.discourse.group/jyijyi/32/997_2.png) [@jyijyi](https://mangoh.discourse.group/u/jyijyi)\ **Post date:** [August 12, 2020, 5:38am UTC](https://mangoh.discourse.group/t/ext-usb-sound-adapter-connected-to-mangoh-board/525/6 "2020-08-12T05:38:48Z")
please see here: > **[Audio USB passthrough on WP7611](https://forum.sierrawireless.com/t/audio-usb-passthrough-on-wp7611/20302/10)** > > Here is my testing: type the following in AT command channel: at!avcfg=5,1,3 AT!AVSETPROFILE=5 in ubuntu PC arecord -D front:CARD=WP7607,DEV=0 -r 8000 --format S16\_LE /home/owner/Downloads/record.wav type the following in WP76 ... ---
**Author:** ![Akshaysk](https://avatars.discourse-cdn.com/v4/letter/a/5f8ce5/32.png) [@Akshaysk](https://mangoh.discourse.group/u/Akshaysk)\ **Post date:** [August 12, 2020, 6:06am UTC](https://mangoh.discourse.group/t/ext-usb-sound-adapter-connected-to-mangoh-board/525/7 "2020-08-12T06:06:51Z")
Hi @jyijyi , I have tried this at my end earlier this is not my use case i believe . I want to play the audio in External USB-Audio dongle for which the USB-AUDIO driver is enabled . Regards - Akshay K ---
**Author:** ![jyijyi](https://sea2.discourse-cdn.com/flex016/user_avatar/mangoh.discourse.group/jyijyi/32/997_2.png) [@jyijyi](https://mangoh.discourse.group/u/jyijyi)\ **Post date:** [August 12, 2020, 7:07am UTC](https://mangoh.discourse.group/t/ext-usb-sound-adapter-connected-to-mangoh-board/525/8 "2020-08-12T07:07:37Z")
no, I don’t have experience on this… Not sure if “-D hw:1,0” is correct on your side. Have you tried to connect to Ubuntu PC first to see how to use that USB sound device?