Subject: Re: [linux-audio-dev] ardour / ypmfpci
From: Paul Davis (pbd_AT_Op.Net)
Date: Mon Jan 07 2002 - 04:16:27 EET
>> has any one got this card to work with ardour ? I've seen a few
>> postings related, but it's still not clear to if there are settings
>> that will work or if the card is just not supported ...
>>
>> yes I know where to change the fragment count, but the values I tried
>> didn't change much of the situation.
>
>what exactly is the problem? i haven't used ardour, but i had problems
>running jmax in realtime with my ymf744b card at 44100 (cd quality).
>these problems went away at 48000 (dat) and multiples (24000, 96000).
my recollection, as mentioned, is that the ymfpci card is quite odd in
that it does not allow integral interrupts-per-buffer. instead, it
fixes the interrupt frequency regardless of buffer size.
ardour assumes that its possible to set a card up much the way that
ASIO does: 2.0 interrupts per buffer traversal. cards that cannot be
setup like this are rare. a workaround for most such cards is to use
some other integral number (e.g. 3.0 interrupts per buffer). however,
the ymfpci is one card that is not amenable to either
configuration.
since understanding latency is important in a DAW, the ymfpci is
spectactularly unsuccessful for such systems: the latency of the
hardware varies over time in a cyclical way. gack!
--p
This archive was generated by hypermail 2b28 : Mon Jan 07 2002 - 04:11:12 EET