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Diffstat (limited to 'Documentation/sound/oss')
| -rw-r--r-- | Documentation/sound/oss/es1371 | 64 |
1 files changed, 0 insertions, 64 deletions
diff --git a/Documentation/sound/oss/es1371 b/Documentation/sound/oss/es1371 deleted file mode 100644 index c3151266771c..000000000000 --- a/Documentation/sound/oss/es1371 +++ /dev/null | |||
| @@ -1,64 +0,0 @@ | |||
| 1 | /proc/sound, /dev/sndstat | ||
| 2 | ------------------------- | ||
| 3 | |||
| 4 | /proc/sound and /dev/sndstat is not supported by the | ||
| 5 | driver. To find out whether the driver succeeded loading, | ||
| 6 | check the kernel log (dmesg). | ||
| 7 | |||
| 8 | |||
| 9 | ALaw/uLaw sample formats | ||
| 10 | ------------------------ | ||
| 11 | |||
| 12 | This driver does not support the ALaw/uLaw sample formats. | ||
| 13 | ALaw is the default mode when opening a sound device | ||
| 14 | using OSS/Free. The reason for the lack of support is | ||
| 15 | that the hardware does not support these formats, and adding | ||
| 16 | conversion routines to the kernel would lead to very ugly | ||
| 17 | code in the presence of the mmap interface to the driver. | ||
| 18 | And since xquake uses mmap, mmap is considered important :-) | ||
| 19 | and no sane application uses ALaw/uLaw these days anyway. | ||
| 20 | In short, playing a Sun .au file as follows: | ||
| 21 | |||
| 22 | cat my_file.au > /dev/dsp | ||
| 23 | |||
| 24 | does not work. Instead, you may use the play script from | ||
| 25 | Chris Bagwell's sox-12.14 package (available from the URL | ||
| 26 | below) to play many different audio file formats. | ||
| 27 | The script automatically determines the audio format | ||
| 28 | and does do audio conversions if necessary. | ||
| 29 | http://home.sprynet.com/sprynet/cbagwell/projects.html | ||
| 30 | |||
| 31 | |||
| 32 | Blocking vs. nonblocking IO | ||
| 33 | --------------------------- | ||
| 34 | |||
| 35 | Unlike OSS/Free this driver honours the O_NONBLOCK file flag | ||
| 36 | not only during open, but also during read and write. | ||
| 37 | This is an effort to make the sound driver interface more | ||
| 38 | regular. Timidity has problems with this; a patch | ||
| 39 | is available from http://www.ife.ee.ethz.ch/~sailer/linux/pciaudio.html. | ||
| 40 | (Timidity patched will also run on OSS/Free). | ||
| 41 | |||
| 42 | |||
| 43 | MIDI UART | ||
| 44 | --------- | ||
| 45 | |||
| 46 | The driver supports a simple MIDI UART interface, with | ||
| 47 | no ioctl's supported. | ||
| 48 | |||
| 49 | |||
| 50 | MIDI synthesizer | ||
| 51 | ---------------- | ||
| 52 | |||
| 53 | This soundcard does not have any hardware MIDI synthesizer; | ||
| 54 | MIDI synthesis has to be done in software. To allow this | ||
| 55 | the driver/soundcard supports two PCM (/dev/dsp) interfaces. | ||
| 56 | |||
| 57 | There is a freely available software package that allows | ||
| 58 | MIDI file playback on this soundcard called Timidity. | ||
| 59 | See http://www.cgs.fi/~tt/timidity/. | ||
| 60 | |||
| 61 | |||
| 62 | |||
| 63 | Thomas Sailer | ||
| 64 | t.sailer@alumni.ethz.ch | ||