From mboxrd@z Thu Jan 1 00:00:00 1970 From: Benno Senoner Date: Fri, 27 Aug 1999 09:59:39 +0000 Subject: Re: [alsa-devel] Re: Bad MIDI performance : 10ms latency instead of the expected 1-1.5ms Message-Id: List-Id: References: In-Reply-To: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: linux-sound@vger.kernel.org > > >200bytes/sec is just rudiculous , how do you plan to drive an external synth > >with that little MIDI bandwidth ? > > check with creative that they actually intend this as a use of the > card :) > > but seriously, Benno you know the difference between a system in which > a single application can take full control of the machine by having a > callback run in interrupt context and one like Linux. with the former > system, the 2 byte FIFO isn't a problem, or rather, it isn't much of a > problem. Yes under DOS this is not a problem since the sequencer it the only app which runs, but on a multitasking system crappy hardware can monopolize the CPU quite a bit. When I get a 2nd PC, I will test the following: Windoze PC+ AWE64 running a sequencer with the MIDI port in thru mode, connect the 2nd PC running Linux (with a DECENT MIDI interface) and then send the full MIDI bandwidth out to the poor windoze box, and measure the midi delay and especially the CPU usage on the box. :-) > > >If this is true, then I will throw away my AWE64 and buy an AudioPCI :-) > > Yes, basically all your problems arise from using consumer > hardware. In particular, consumer hardware that isn't designed to work > correctly in (1) a multi-user, multitasking, virtual memory OS and (2) > isn't really intended to do much more than make noise for games and > sound effects. > > As I never tire of saying, Hoontech's card is $39 and its hard to beat. Do you know if this card is available in Europe ( Italy/Germany) ? I heard that the S/N ratio is quite good. (Is this card capable of providing 2 separate stereo outputs ( 4 chans ?) regards, Benno.