# Recording MdmTxAudio **URL:** \ **Category:** mangOH Yellow\ **Created:** [July 21, 2022, 5:20pm UTC](https://mangoh.discourse.group/t/recording-mdmtxaudio/10058 "2022-07-21T17:20:23Z")\ **Posts on this page:** 4\ **Page:** 1
**Author:** ![jameswollaeger](https://avatars.discourse-cdn.com/v4/letter/j/e495f1/32.png) [@jameswollaeger](https://mangoh.discourse.group/u/jameswollaeger)\ **Post date:** [July 21, 2022, 5:20pm UTC](https://mangoh.discourse.group/t/recording-mdmtxaudio/10058/1 "2022-07-21T17:20:23Z")
Hello, I posted a while back and learned that there is a limitation whereby a legato audio recorder cannot be connected to a legato audio player. I’m using mangoh Yellow and WP7611 modem. I thought about trying a different approach whereby I try to record/stream via HTTP the audio leaving the modem TX channel. To do this I use the following API’s: MdmTxAudioRef = le\_audio\_OpenModemVoiceTx(); AudioOutputConnectorRef = le\_audio\_CreateConnector(); AudioOutputConnectorRef2 = le\_audio\_CreateConnector(); res = le\_audio\_Connect(AudioOutputConnectorRef , MdmTxAudioRef ); res = le\_audio\_Connect(AudioOutputConnectorRef2,MdmTxAudioRef); In the above example, I create a new audio reference for file play, and connect it with AudioOutputConnectorRef. So my wav audio files should play over this connector. I recently added the AudioOutputConnectorRef2 and connect it to MdmTxAudioRef. I don’t get any errors when connecting everything up. But I believe I see a kernal exception thrown in the logs: [3559.890380] MDM Media1: ASoC: no backend DAIs enabled for MDM Media1 [3559.896481] q6asm\_callback: cmd = 0x10bcd returned error = 0x1 [3559.901769] \_\_q6asm\_cmd: DSP returned error[ADSP\_EFAILED] opcode 68557 ```auto =ERR= | audioDaemon[1784] | buffer_bytes = (2560,2560) omin=0 omax=0 int=1 empty=0 period_bytes = (320,320) omin=0 omax=0 int=1 empty=0 Jul 21 12:14:49 swi-mdm9x28-wp user.debug Legato: DBUG | audioCompExe[2029]/framework T=TransmitSamples | thread.c PThreadStartRoutine() 478 | Set nice level to 0. Jul 21 12:14:49 swi-mdm9x28-wp user.info Legato: INFO | audioCompExe[2029]/audioComponent T=TransmitSamples | audio.c TransmitAudioSamplesThread() 263 | Tx Thread starting for audiostream with ref: 0x80f. Jul 21 12:14:49 swi-mdm9x28-wp user.debug Legato: DBUG | audioCompExe[2029]/audioComponent T=TransmitSamples | perfTestLog.h LogPerfString() 9 | Perftest: TransmitSamplesThread Starting Transmit thread.: 2022-07-21 17:14:49.766 Jul 21 12:14:49 swi-mdm9x28-wp user.err Legato: =ERR= | audioDaemon[1784]/alsa_intf T=main | pa_pcm_alsa.c InitPcmPlaybackCapture() 455 | Failed in pcm_prepare Jul 21 12:14:49 swi-mdm9x28-wp user.err Legato: =ERR= | audioDaemon[1784] | cannot prepare channel: errno =-22 Jul 21 12:14:49 swi-mdm9x28-wp user.err kernel: [3559.890380] MDM Media1: ASoC: no backend DAIs enabled for MDM Media1 Jul 21 12:14:49 swi-mdm9x28-wp user.err kernel: [3559.896481] q6asm_callback: cmd = 0x10bcd returned error = 0x1 Jul 21 12:14:49 swi-mdm9x28-wp user.err kernel: [3559.901769] __q6asm_cmd: DSP returned error[ADSP_EFAILED] opcode 68557 Jul 21 12:14:49 swi-mdm9x28-wp user.err Legato: =ERR= | audioDaemon[1784]/audio T=main | le_media.c le_media_Capture() 2204 | PCM cannot be open Jul 21 12:14:49 swi-mdm9x28-wp user.debug Legato: DBUG | audioDaemon[1784]/audio T=main | le_media.c le_media_Stop() 2117 | Close pa_pcm Jul 21 12:14:49 swi-mdm9x28-wp user.debug Legato: DBUG | audioDaemon[1784]/audio T=main | le_media.c le_media_Stop() 2134 | Interface 11 Stopped ``` Does anyone have any recommendations in trying to tap into the MdmTx channel and record the output? ---
**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:** [July 21, 2022, 11:25pm UTC](https://mangoh.discourse.group/t/recording-mdmtxaudio/10058/2 "2022-07-21T23:25:24Z")
are you trying to play audio or record audio during the voice call? ---
**Author:** ![jameswollaeger](https://avatars.discourse-cdn.com/v4/letter/j/e495f1/32.png) [@jameswollaeger](https://mangoh.discourse.group/u/jameswollaeger)\ **Post date:** [July 22, 2022, 6:29pm UTC](https://mangoh.discourse.group/t/recording-mdmtxaudio/10058/3 "2022-07-22T18:29:55Z")
I’m playing audio in one thread and then recording the call in another. ---
**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:** [July 23, 2022, 2:00am UTC](https://mangoh.discourse.group/t/recording-mdmtxaudio/10058/4 "2022-07-23T02:00:44Z")
have you tried the AT!AVAUDIO command first? ![image](https://us1.discourse-cdn.com/flex016/uploads/mangoh/original/2X/9/9a3a7184c6beca752517dd5743de9277a7cefe9e.png)