# USB audio card on Raspberry Pi **URL:** \ **Category:** FMOD Engine\ **Created:** [July 1, 2015, 2:45pm UTC](https://qa.fmod.com/t/usb-audio-card-on-raspberry-pi/11972 "2015-07-01T14:45:17Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![Rolalala](https://avatars.discourse-cdn.com/v4/letter/r/c0e974/32.png) [@Rolalala](https://qa.fmod.com/u/Rolalala)\ **Post date:** [July 1, 2015, 2:45pm UTC](https://qa.fmod.com/t/usb-audio-card-on-raspberry-pi/11972/1 "2015-07-01T14:45:17Z")
Hi, First of all, sorry for my english ! I’m using fmodex to do real-time treatment on a raspberry pi. Thanks an USB audio card plug and play i added an audio input on the rpi. I installed correctly libraries and examples compiled. But when i run record.cpp nothing happens. Except this : ``` ================================================== Record Example. Copyright (c) Firelight Technologies 2004-2015. ================================================== Adjust LATENCY define to compensate for stuttering Current value is 50ms Press 1 to enable DSP effect Press Q to quit Adjusted playback latency: 2400 (50ms) Current playback latency: 0 (0ms) Record position: 0 Play Position: 0 ``` Adjusted playback latency: 2400 (50ms) Current playback latency: 0 (0ms) Record position: 0 Play Position: 0 It’s like if the mic was not used ☹ However the audio card is indexed in 0 and in record.cpp i was careful to set up DEVICE\_INDEX to “0” … Otherwise when i run the play\_sound.cpp, the audio card’s headphone works properly. So if anybody has an idea i’ll be happy ^^. If you want details as term output or whatever ask ! Thanks ! **UPDATE:** Thanks Mathew for your help. So, yes i guess it’s FMOD5 … I’m a bit lost (bad in english). This is the output when i run record.cpp ``` [LOG] SystemI::init : FMOD Studio Version: 00010603 (64399) [LOG] SystemI::init : maxchannels = 100, flags = 00000000, extradriverdata = (nil) [LOG] SystemI::close : [LOG] SystemI::close : Stop all sounds [LOG] SystemI::close : Remove miscllaneous DSP stuff. [LOG] SystemI::close : done. [LOG] FMOD_OS_Init : Detected VFP instruction support, will use VFP optimized mixing and resampling. [LOG] OutputALSA::registerLib : Loaded ALSA version 1.0.25. [LOG] OutputALSA::enumerate : Found device NAME:null IOID:(null). [LOG] OutputALSA::enumerate : Found device NAME:default:CARD=Set IOID:(null). [LOG] OutputALSA::enumerate : Found device NAME:sysdefault:CARD=Set IOID:(null). [LOG] OutputALSA::enumerate : Found device NAME:front:CARD=Set,DEV=0 IOID:(null). [LOG] OutputALSA::enumerate : Found device NAME:surround40:CARD=Set,DEV=0 IOID:(null). [LOG] OutputALSA::enumerate : Found device NAME:surround41:CARD=Set,DEV=0 IOID:(null). [LOG] OutputALSA::enumerate : Found device NAME:surround50:CARD=Set,DEV=0 IOID:(null). [LOG] OutputALSA::enumerate : Found device NAME:surround51:CARD=Set,DEV=0 IOID:(null). [LOG] OutputALSA::enumerate : Found device NAME:surround71:CARD=Set,DEV=0 IOID:(null). [LOG] OutputALSA::enumerate : Found device NAME:iec958:CARD=Set,DEV=0 IOID:(null). [LOG] OutputALSA::enumerate : Found device NAME:default:CARD=ALSA IOID:Output. [LOG] OutputALSA::enumerate : Found device NAME:sysdefault:CARD=ALSA IOID:Output. [LOG] OutputALSA::init : Requested block size: 1024, Actual block size: 1024 [LOG] OutputALSA::init : Requested buffer size: 4096, Actual buffer size: 4096 [LOG] Thread::initThread : Initializing FMOD mixer thread. priority 3 [LOG] Thread::initThread : - Stacksize 49152. Stack pointer (nil) : usesemaphore = 0 : sleeptime = 0 [LOG] Thread::callback : * FMOD mixer thread started [LOG] SystemI::init : Set up emulated output [LOG] SystemI::init : create the channel pool [LOG] SystemI::init : Set up streamer [LOG] Thread::initThread : Initializing FMOD stream thread. priority 2 [LOG] Thread::initThread : - Stacksize 65536. Stack pointer (nil) : usesemaphore = 0 : sleeptime = 10 [LOG] Thread::callback : * FMOD stream thread started [LOG] SystemI::createSoundInternal : filename = : mode 00000402 [LOG] SystemI::createSoundInternal : exinfo->cbsize = 140 [LOG] SystemI::createSoundInternal : exinfo->length = 96000 [LOG] SystemI::createSoundInternal : exinfo->numchannels = 1 [LOG] SystemI::createSoundInternal : exinfo->defaultfrequency = 48000 [LOG] SystemI::createSoundInternal : exinfo->format = 2 [WRN] File::open : File offset: 0 + length: 96000 > actual file size 0, truncating length. [LOG] SystemI::createSoundInternal : Format has 0 subsounds. [LOG] SystemI::createSoundInternal : Create as FMOD_CREATESAMPLE [LOG] SystemI::createSoundInternal : creating subsound 0/0 [LOG] SystemI::createSample : mode 00000402 length 48000 samples, lengthbytes 0 [LOG] SystemI::createSample : subsamples = 1, channels = 1 [LOG] SystemI::createSample : subsample 0. output = 0x2e2a30 [LOG] OutputSoftware::createSample : lengthpcm 48000, lengthbytes 0, channels 1, format 2, freq 48000, mode 0000040a [LOG] SystemI::createSoundInternal : No name found in file, use filename. [LOG] SystemI::createSoundInternal : done. OpenState now = FMOD_OPENSTATE_READY. [LOG] OutputALSA::recordStart : Requested block size: 1024, Actual block size: 1024 [LOG] OutputALSA::recordStart : Requested buffer size: 8192, Actual buffer size: 8192 ``` In fact, i’ve already made a program for real-time treatment, who worked on rpi, but my SD card failed and i have to set up a new one and since that fail, impossible to do anything with FMOD. Then I was asking if i have to configure ALSA or pulseaudio or whatever in a certain way ? What i don’t understand is the fact that with arecord or aplay my microphone/speaker works but not with FMOD. Is it possible it comes from my installation ? Many thanks for your attention. ---
**Author:** ![mathew](https://yyz2.discourse-cdn.com/flex036/user_avatar/qa.fmod.com/mathew/32/431_2.png) [@mathew](https://qa.fmod.com/u/mathew)\ **Post date:** [July 2, 2015, 1:16am UTC](https://qa.fmod.com/t/usb-audio-card-on-raspberry-pi/11972/2 "2015-07-02T01:16:45Z")
> [@](#): > > Hi, > > First of all, sorry for my english ! > I’m using fmodex to do real-time treatment on a raspberry pi. Thanks an USB audio card plug and play i added an audio input on the rpi. I installed correctly libraries and examples compiled. But when i run record.cpp nothing happens. Except this : > > ``` > ================================================== > Record Example. > Copyright (c) Firelight Technologies 2004-2015. > ================================================== > > Adjust LATENCY define to compensate for stuttering > Current value is 50ms > > Press 1 to enable DSP effect > Press Q to quit > > Adjusted playback latency: 2400 (50ms) > Current playback latency: 0 (0ms) > Record position: 0 > Play Position: 0 > > ``` > > Adjusted playback latency: 2400 (50ms) Current playback latency: 0 (0ms) Record position: 0 Play Position: 0 > > It’s like if the mic was not used ☹ However the audio card is indexed in 0 and in record.cpp i was careful to set up DEVICE\_INDEX to “0” … > > Otherwise when i run the play\_sound.cpp, the audio card’s headphone works properly. So if anybody has an idea i’ll be happy ^^. > > If you want details as term output or whatever ask ! > > Thanks ! > > **UPDATE:** > > Thanks Mathew for your help. So, yes i guess it’s FMOD5 … I’m a bit lost (bad in english). This is the output when i run record.cpp > > ``` > [LOG] SystemI::init : FMOD Studio Version: 00010603 (64399) > [LOG] SystemI::init : maxchannels = 100, flags = 00000000, extradriverdata = (nil) > > [LOG] SystemI::close : > [LOG] SystemI::close : Stop all sounds > [LOG] SystemI::close : Remove miscllaneous DSP stuff. > [LOG] SystemI::close : done. > > [LOG] FMOD_OS_Init : Detected VFP instruction support, will use VFP optimized mixing and resampling. > [LOG] OutputALSA::registerLib : Loaded ALSA version 1.0.25. > [LOG] OutputALSA::enumerate : Found device NAME:null IOID:(null). > [LOG] OutputALSA::enumerate : Found device NAME:default:CARD=Set IOID:(null). > [LOG] OutputALSA::enumerate : Found device NAME:sysdefault:CARD=Set IOID:(null). > [LOG] OutputALSA::enumerate : Found device NAME:front:CARD=Set,DEV=0 IOID:(null). > [LOG] OutputALSA::enumerate : Found device NAME:surround40:CARD=Set,DEV=0 IOID:(null). > [LOG] OutputALSA::enumerate : Found device NAME:surround41:CARD=Set,DEV=0 IOID:(null). > [LOG] OutputALSA::enumerate : Found device NAME:surround50:CARD=Set,DEV=0 IOID:(null). > [LOG] OutputALSA::enumerate : Found device NAME:surround51:CARD=Set,DEV=0 IOID:(null). > [LOG] OutputALSA::enumerate : Found device NAME:surround71:CARD=Set,DEV=0 IOID:(null). > [LOG] OutputALSA::enumerate : Found device NAME:iec958:CARD=Set,DEV=0 IOID:(null). > [LOG] OutputALSA::enumerate : Found device NAME:default:CARD=ALSA IOID:Output. > [LOG] OutputALSA::enumerate : Found device NAME:sysdefault:CARD=ALSA IOID:Output. > [LOG] OutputALSA::init : Requested block size: 1024, Actual block size: 1024 > [LOG] OutputALSA::init : Requested buffer size: 4096, Actual buffer size: 4096 > [LOG] Thread::initThread : Initializing FMOD mixer thread. priority 3 > [LOG] Thread::initThread : - Stacksize 49152. Stack pointer (nil) : usesemaphore = 0 : sleeptime = 0 > [LOG] Thread::callback : * FMOD mixer thread started > [LOG] SystemI::init : Set up emulated output > [LOG] SystemI::init : create the channel pool > [LOG] SystemI::init : Set up streamer > [LOG] Thread::initThread : Initializing FMOD stream thread. priority 2 > [LOG] Thread::initThread : - Stacksize 65536. Stack pointer (nil) : usesemaphore = 0 : sleeptime = 10 > [LOG] Thread::callback : * FMOD stream thread started > [LOG] SystemI::createSoundInternal : filename = : mode 00000402 > [LOG] SystemI::createSoundInternal : exinfo->cbsize = 140 > [LOG] SystemI::createSoundInternal : exinfo->length = 96000 > [LOG] SystemI::createSoundInternal : exinfo->numchannels = 1 > [LOG] SystemI::createSoundInternal : exinfo->defaultfrequency = 48000 > [LOG] SystemI::createSoundInternal : exinfo->format = 2 > [WRN] File::open : File offset: 0 + length: 96000 > actual file size 0, truncating length. > [LOG] SystemI::createSoundInternal : Format has 0 subsounds. > [LOG] SystemI::createSoundInternal : Create as FMOD_CREATESAMPLE > [LOG] SystemI::createSoundInternal : creating subsound 0/0 > [LOG] SystemI::createSample : mode 00000402 length 48000 samples, lengthbytes 0 > [LOG] SystemI::createSample : subsamples = 1, channels = 1 > [LOG] SystemI::createSample : subsample 0. output = 0x2e2a30 > [LOG] OutputSoftware::createSample : lengthpcm 48000, lengthbytes 0, channels 1, format 2, freq 48000, mode 0000040a > [LOG] SystemI::createSoundInternal : No name found in file, use filename. > [LOG] SystemI::createSoundInternal : done. OpenState now = FMOD_OPENSTATE_READY. > > [LOG] OutputALSA::recordStart : Requested block size: 1024, Actual block size: 1024 > [LOG] OutputALSA::recordStart : Requested buffer size: 8192, Actual buffer size: 8192 > > ``` > > In fact, i’ve already made a program for real-time treatment, who worked on rpi, but my SD card failed and i have to set up a new one and since that fail, impossible to do anything with FMOD. Then I was asking if i have to configure ALSA or pulseaudio or whatever in a certain way ? > What i don’t understand is the fact that with arecord or aplay my microphone/speaker works but not with FMOD. Is it possible it comes from my installation ? > > Many thanks for your attention. As FMOD4 doesn’t run on Raspberry Pi can I assume you mean FMOD5? Also, can you update your question with TTY output from the logging version of FMOD? ---
**Author:** ![mathew](https://yyz2.discourse-cdn.com/flex036/user_avatar/qa.fmod.com/mathew/32/431_2.png) [@mathew](https://qa.fmod.com/u/mathew)\ **Post date:** [July 2, 2015, 11:18pm UTC](https://qa.fmod.com/t/usb-audio-card-on-raspberry-pi/11972/3 "2015-07-02T23:18:08Z")
Thank you for the information, I will investigate ALSA recording in FMOD 5 on a clean Raspberry Pi install and report back my findings. **EDIT:** Thanks for your patience, there is indeed a bug with our implementation of ALSA recording and it has been fixed ready for our next release of all branches.