Moin Meister Quoting Clemens Ladisch <clemens@xxxxxxxxxx>: > > but only if samplerate = 48000; > > if samplerate = 44100 - then not :( > > 44k file play in 48k mode :D it sounds funnee :D > > > > i gotta this : > > ALSA lib pcm.c:7160:(snd_pcm_set_params) Rate doesn't match (requested > 44100Hz, get 0Hz) > > Please show the source code of your program. see below I have on my notebook 2 sound cards * built in $ lspci ... 00:1b.0 Audio device: Intel Corporation 82801G (ICH7 Family) High Definition Audio Controller (rev 02) ... and second on USB wire - Edirol by Roland ... I have switch em to 44,1k As given here http://www.alsa-project.org/alsa-doc/alsa-lib/group___p_c_m.html#g6aa164ed37308d66bcc079f5cd265a09 latency required overall latency in us (0 = optimum latency for players) i have try to set optimum latency = 0; snd_pcm_set_params(handle, SND_PCM_FORMAT_S16_LE, SND_PCM_ACCESS_RW_INTERLEAVED, channelz, samplerate , 0, 0) ./pcm_min01 '/mnt/hda2/Booty Luv - Shine/Booty Luv - Boogie 2nite (DJ Teddy-o remix).wav' Now playing to USB device "hw:1,0" gotta this : Short write (expected 4096, wrote 360) Short write (expected 4096, wrote 360) Short write (expected 4096, wrote 2427) wery fragmentary sound with latency = 500000 us USB play is OK. But why i can not play my wave on notebook sound device "hw:0,0" ?? Tnx in advance Alf /* * This extra small demo sends a random samples to your speakers. */ #include "alsa/asoundlib.h" #include <stdio.h> #include <fcntl.h> // #include <unistd.h> // #include <sys/types.h> // //static char *device = "default"; /* playback device */ //static char *device = "hw:0,0"; static char *device = "hw:1,0"; snd_output_t *output = NULL; //unsigned char buffer[16*1024]; /* some random data */ /*unsigned*/ short buffer[/*4*1024*/8192]; int main( int argc, char *argv[] ) { int err; unsigned int i; int channelz, bytes_per_sample, samplerate; snd_pcm_t *handle; snd_pcm_sframes_t frames , frames_2_write; int einfd ; int rdstatus ; // samplerate = 48000; samplerate = 44100; channelz =2; bytes_per_sample = 2; frames_2_write = sizeof(buffer) / (channelz * bytes_per_sample); //for (i = 0; i < (4*1024) ; i++){ buffer[i] = random() & 0xffff; } einfd = open( argv[1] , O_RDONLY ); lseek(einfd, 48L ,SEEK_SET); if ((err = snd_pcm_open(&handle, device, SND_PCM_STREAM_PLAYBACK, 0)) < 0) { printf("Playback open error: %s\n", snd_strerror(err)); exit(EXIT_FAILURE); } if ((err = snd_pcm_set_params(handle, SND_PCM_FORMAT_S16_LE, SND_PCM_ACCESS_RW_INTERLEAVED, channelz, samplerate , 0, 500000)) < 0) { /* 500000 0.5sec */ printf("Playback open error: %s\n", snd_strerror(err)); exit(EXIT_FAILURE); } for (i = 0; i < 128; i++) { rdstatus = read(einfd,&buffer[0],sizeof(buffer)); frames = snd_pcm_writei(handle, buffer, frames_2_write ); if (frames < 0) frames = snd_pcm_recover(handle, frames, 1); if (frames < 0) { printf("snd_pcm_writei failed: %s\n", snd_strerror(err)); /*break;*/ goto yuck_off; } if (frames > 0 && frames < (long) frames_2_write) printf("Short write (expected %li, wrote %li)\n", (long) frames_2_write, frames); } yuck_off: close(einfd); snd_pcm_close(handle); return 0; } ---- _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
