How to get raw voice using mic in linux

Question

I am writing a speech recognition program using cmu sphinx. To do this, get the .raw audio file . How can I get voice from my microphone in raw format? For this, I thought. They say that I can read from /dev/dsp , but I can not find this file / device. I'm on ArchLinux with alsa. Linux version 3.2.9-1-pae .

 madper@myhost /dev % ls agpgart ptmx tty23 tty58 vcs28 vcs62 vcsa39 autofs pts/ tty24 tty59 vcs29 vcs63 vcsa4 block/ random tty25 tty6 vcs3 vcs7 vcsa40 bsg/ rfkill tty26 tty60 vcs30 vcs8 vcsa41 btrfs-control rtc@ tty27 tty61 vcs31 vcs9 vcsa42 bus/ rtc0 tty28 tty62 vcs32 vcsa vcsa43 char/ sda tty29 tty63 vcs33 vcsa1 vcsa44 console sda1 tty3 tty7 vcs34 vcsa10 vcsa45 core@ sda2 tty30 tty8 vcs35 vcsa11 vcsa46 cpu/ sda3 tty31 tty9 vcs36 vcsa12 vcsa47 cpu_dma_latency sda4 tty32 ttyS0 vcs37 vcsa13 vcsa48 disk/ sda5 tty33 ttyS1 vcs38 vcsa14 vcsa49 dri/ sda6 tty34 ttyS2 vcs39 vcsa15 vcsa5 fb0 sda7 tty35 ttyS3 vcs4 vcsa16 vcsa50 fd@ sda8 tty36 uinput vcs40 vcsa17 vcsa51 freefall shm/ tty37 urandom vcs41 vcsa18 vcsa52 full snapshot tty38 v4l/ vcs42 vcsa19 vcsa53 fuse snd/ tty39 vcs vcs43 vcsa2 vcsa54 hidraw0 stderr@ tty4 vcs1 vcs44 vcsa20 vcsa55 hidraw1 stdin@ tty40 vcs10 vcs45 vcsa21 vcsa56 hpet stdout@ tty41 vcs11 vcs46 vcsa22 vcsa57 initctl| tty tty42 vcs12 vcs47 vcsa23 vcsa58 input/ tty0 tty43 vcs13 vcs48 vcsa24 vcsa59 kmsg tty1 tty44 vcs14 vcs49 vcsa25 vcsa6 log= tty10 tty45 vcs15 vcs5 vcsa26 vcsa60 loop-control tty11 tty46 vcs16 vcs50 vcsa27 vcsa61 mapper/ tty12 tty47 vcs17 vcs51 vcsa28 vcsa62 mcelog tty13 tty48 vcs18 vcs52 vcsa29 vcsa63 media0 tty14 tty49 vcs19 vcs53 vcsa3 vcsa7 mei tty15 tty5 vcs2 vcs54 vcsa30 vcsa8 mem tty16 tty50 vcs20 vcs55 vcsa31 vcsa9 net/ tty17 tty51 vcs21 vcs56 vcsa32 vga_arbiter network_latency tty18 tty52 vcs22 vcs57 vcsa33 video0 network_throughput tty19 tty53 vcs23 vcs58 vcsa34 watchdog null tty2 tty54 vcs24 vcs59 vcsa35 zero port tty20 tty55 vcs25 vcs6 vcsa36 ppp tty21 tty56 vcs26 vcs60 vcsa37 psaux tty22 tty57 vcs27 vcs61 vcsa38 

Is there any other way to get a vote? Use GStreamer? Or can I use google api to get text by downloading an audio file? Any other tips are also welcome. Thanks you

Answer 1

Here are some useful links that will tell you how to record voice data using ALSA -

• Resource 1
• Linux Journal

Here is a link that will give you some idea of ​​ALSA and its configuration.

This is the official directory of the ALSA API.

This may be out of context, but here is a list of recommendations that should be considered when performing audio programs.

If you need some alternatives to ALSA, I would suggest looking at Port Audio .

Answer 2

/dev/dsp is OSS, which is the audio subsystem used by older versions of Linux. To record sound, use either the GStreamer API (preferred) or ALSA (acceptable).