Hi All PowerBook5,8 here.
I want to play a sound file that is coded to 24 bits/96000 Hz at exactly these sample rates. $ file 24-96-sound.wav 24-96-sound.wav: RIFF (little-endian) data, WAVE audio, Microsoft PCM, 24 bit, stereo 96000 Hz Apple says the soundcard I have is able to do 16 or 24 bits, and sample rates of up to 96KHz: "The audio circuitry and audio device drivers handle audio data in multiple formats. Both digital and analog audio circuitry handle audio input and output data at sample rates of 32.0 kHz, 44.1 kHz, 48.0 kHz, 64.0 kHz, 88.2 kHz, and 96.0 kHz at sample depths of 16 bits and 24 bits." Problem is, it looks as if I get maximum 48KHz when playing this 24/96 file: ------------------------------- $ aplay -v -r 96000 24-96-sound.wav Playing WAVE '24-96-sound.wav' : Signed 24 bit Little Endian in 3bytes, Rate 96000 Hz, Stereo Plug PCM: Rate conversion PCM (48000, sformat=S16_BE) Its setup is: stream : PLAYBACK access : RW_INTERLEAVED format : S24_3LE subformat : STD channels : 2 rate : 96000 exact rate : 96000 (96000/1) msbits : 24 buffer_size : 32768 period_size : 2048 period_time : 21333 tstamp_mode : NONE period_step : 1 avail_min : 2048 period_event : 0 start_threshold : 32768 stop_threshold : 32768 silence_threshold: 0 silence_size : 0 boundary : 1073741824 Slave: Soft volume PCM Control: PCM Playback Volume min_dB: -51 max_dB: 0 resolution: 256 Its setup is: stream : PLAYBACK access : MMAP_INTERLEAVED format : S16_BE subformat : STD channels : 2 rate : 48000 exact rate : 48000 (48000/1) msbits : 16 buffer_size : 16384 period_size : 1024 period_time : 21333 tstamp_mode : NONE period_step : 1 avail_min : 1024 period_event : 0 start_threshold : 16384 stop_threshold : 16384 silence_threshold: 0 silence_size : 0 boundary : 1073741824 Slave: Direct Stream Mixing PCM Its setup is: stream : PLAYBACK access : MMAP_INTERLEAVED format : S16_BE subformat : STD channels : 2 rate : 48000 exact rate : 48000 (48000/1) msbits : 16 buffer_size : 16384 period_size : 1024 period_time : 21333 tstamp_mode : NONE period_step : 1 avail_min : 1024 [ .... ] ----------------------------- mplayer: ----------------------------- $ mplayer -identify 24-96-sound.wav MPlayer SVN-r29409-4.3.3 (C) 2000-2009 MPlayer Team Can't open joystick device /dev/input/js0: No such file or directory Can't init input joystick mplayer: could not connect to socket mplayer: No such file or directory Failed to open LIRC support. You will not be able to use your remote control. Playing 24-96-sound.wav. ID_AUDIO_ID=0 Audio only file format detected. ID_FILENAME=24-96-sound.wav ID_DEMUXER=audio ID_AUDIO_FORMAT=1 ID_AUDIO_BITRATE=4608000 ID_AUDIO_RATE=0 ID_AUDIO_NCH=2 ID_LENGTH=394.00 ID_SEEKABLE=1 ID_CHAPTERS=0 ========================================================================== Opening audio decoder: [pcm] Uncompressed PCM audio decoder AUDIO: 96000 Hz, 2 ch, s24le, 4608.0 kbit/100.00% (ratio: 576000->576000) ID_AUDIO_BITRATE=4608000 ID_AUDIO_RATE=96000 ID_AUDIO_NCH=2 Selected audio codec: [pcm] afm: pcm (Uncompressed PCM) ========================================================================== [AO_ALSA] Format s24le is not supported by hardware, trying default. AO: [alsa] 48000Hz 2ch s16le (2 bytes per sample) ID_AUDIO_CODEC=pcm Video: no video Starting playback... ----------------------------- do I have to recompile the 2.6.30 kernel I use, and if yes, what do I change?: excerpt pcm.h: ------------------------ /* If you change this don't forget to change rates[] table in pcm_native.c */ #define SNDRV_PCM_RATE_5512 (1<<0) /* 5512Hz */ #define SNDRV_PCM_RATE_8000 (1<<1) /* 8000Hz */ #define SNDRV_PCM_RATE_11025 (1<<2) /* 11025Hz */ #define SNDRV_PCM_RATE_16000 (1<<3) /* 16000Hz */ #define SNDRV_PCM_RATE_22050 (1<<4) /* 22050Hz */ #define SNDRV_PCM_RATE_32000 (1<<5) /* 32000Hz */ #define SNDRV_PCM_RATE_44100 (1<<6) /* 44100Hz */ #define SNDRV_PCM_RATE_48000 (1<<7) /* 48000Hz */ #define SNDRV_PCM_RATE_64000 (1<<8) /* 64000Hz */ #define SNDRV_PCM_RATE_88200 (1<<9) /* 88200Hz */ #define SNDRV_PCM_RATE_96000 (1<<10) /* 96000Hz */ #define SNDRV_PCM_RATE_176400 (1<<11) /* 176400Hz */ #define SNDRV_PCM_RATE_192000 (1<<12) /* 192000Hz */ ---------------------- Or some module parameter I could change for what I want? What else? Thanks in anticipation Best regards Wolfgang -- http://heelsbroke.wordpress.com -- To UNSUBSCRIBE, email to debian-powerpc-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org
