[linux-audio-dev] Basic information

[Sreelal Chandrasenan]

We are using LynxOne soundcard with OSS driver in digital mode with external clock option.
We want to check the presense of Digital clock, before starting the audio process.
Initially, we thought of using the input H/W buffer sample count to check that. But it does not work always. Sometime even with valid external clock,  driver won't place any data in the hardware buffer even after few minutes.
 Did you come across this problem?

 Also we have to delay the Timecode. We are not using MIDI feature. But time code comes only in MIDI port. Is it easy to change the timecode (LTC) in the MIDI stream?





-----Original Message-----
From: Paul Davis [mailto:pbd at op.net]
Sent: Thursday, September 19, 2002 7:16 AM
To: linux-audio-dev at music.columbia.edu
Subject: Re: [linux-audio-dev] Basic information 


>>> Hi. Could anyone point me to some very basic information to give me 
>>> some
>>> idea of programming for sound in linux.
>>
>> we can't even begin to answer such a nebulous question i'm afraid.
>
>why not? I would just start to have a look at other sound applications 
>and
>try to understand what they do. That's actually how I did it. And then 
>you
>can get yourself a working installation of alsa and try to build the
>existing documentation. In the meantime there's even a small primer,
>how to open a sound device and make some noise.

because its far from clear that this is the right thing to do with an
SC port. if you don't know what SC is, you might not realize that the
way 95% of all linux audio applications are written doesn't fit with
SC's basic architectural model at all. many people think that writing
a soundapp consists of opening a device, dumping some data to it and
closing it. some programs can do that, but SC cannot.

i don't know how much the questioner knows about the internal design
of SC. its therefore not possible to answer the question until he pins
down what he wants to do. 

--p
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