[PlanetCCRMA] Using 2nd sound card for output

Roy Vestal rvestal at trilug.org
Thu Nov 15 12:50:01 2007

The AC'97 doesn't normally come with a MIDI port. I think you may have 
to purchase one. For example a USB/MIDI box from M-Audio. Check with the 
alsa-project and make sure it's supported.

Well, I've given you all the info I know! HTH  :)

Fritz Whittington wrote:
> On or about 2007-11-14 15:37, Fernando Lopez-Lezcano pulled out a 
> trusty #2 pencil and scribbled:
>> On Wed, 2007-11-14 at 14:13 -0600, Fritz Whittington wrote:
>>> On or about 2007-11-13 13:04, Fernando Lopez-Lezcano pulled out a 
>>> trusty #2 pencil and scribbled:
>>>> On Tue, 2007-11-13 at 13:12 -0500, Roy Vestal wrote:
>>>>> I have FC7 with Ardour2, JACK, etc. working well. I have a Delta 
>>>>> 1010 as well as an on board AC'97. The output to the AC'97 is not 
>>>>> showing in JACK, but it works with "play wav.wav" for example. Is 
>>>>> there a way to get it so I can route the output of JACK apps 
>>>>> (ardour2 for ex) to the AC'97?
>>>> Not really (unless you don't mind periodic clicks in the AC97 output).
>>>> If you want to use two cards they have to be in sync, that is, one has
>>>> to be a slave to the other. Otherwise the sampling rate clocks will be
>>>> slightly off and one card will output samples faster than the other 
>>>> and
>>>> eventually will have to skip a period so the other can catch up 
>>>> (ie: an
>>>> xrun or click will happen).
>>>> Does the AC97 onboard have an sp/dif output? If so you could perhaps
>>>> slave the 1010 to it.         
>>> I'd be really happy if I could just get the AC97 to work as the only 
>>> sound card, since it's the only thing I have in the laptop.
>>> Can someone point me to a HOW-TO (for dummies) to get midi out of 
>>> the AC97?  (If I install plain vanilla Fedora 7, the sound card 
>>> works for everything except midi.  If I install PlanetCCRMA's 
>>> version of Fedora 7, even that stops working!)
>> [I presume you meant to send to the list]
>> Midi is just a control protocol, you don't get sound out of it. Most
>> soundcards don't have a built-in synthesizer which responds to midi
>> commands, which is probably what you mean. Other exotic operating
>> systems use software synths to create sound when you send midi to the
>> "card". Linux is no different, you need to use a software synth to
>> render your sounds in most cases. Packages like ZynAddSubFX, Amsynth,
>> etc, etc.
>> -- Fernando
> Yes, I understand what MIDI is and that I need a software synthesizer 
> to make sounds.  What I am looking for is a step-by-step installation 
> how-to to make it all actually work.  I've Googled tons of docs, most 
> of which apply to some other sound card, or to some other version of 
> Linux, or some earlier version of Fedora.