Re: [LAD] ALSA MIDI latency test results are far away from reality

On 07/14/2010 05:27 PM, Ralf Mardorf wrote:
> On Wed, 2010-07-14 at 17:24 +0200, Ralf Mardorf wrote:
>> On Wed, 2010-07-14 at 17:21 +0200, Ralf Mardorf wrote:
>>> On Wed, 2010-07-14 at 10:53 -0400, Paul Davis wrote:
>>>> On Wed, Jul 14, 2010 at 9:52 AM, Clemens Ladisch <clemens@email-addr-hidden> wrote:
>>>>> Is this connection through JACK or through ALSA, i.e., does it show up
>>>>> in the output of "aconnect -l"? From what I understand, JACK's sample-
>>>>> synchronous timing always adds latency, and might add period-related
>>>>> jitter depending on the implementation.
>>>>
>>>> the good stuff adds 1 JACK period of latency to whatever the ALSA
>
> PPS:
>
> A misunderstanding by me?
>
>>>> sequencer's direct delivery + the driver does, and zero jitter.
>
> Is there JACK MIDI for hw MIDI too, but only for virtual synth?

No, JACK-MIDI is a protocol in software.

There are bridges to hardware which go connect either via ALSA-sequencer
or raw-ALSA interface to the MIDI hardware.

JACKd itself includes those bridges (-Xseq, -Rraw) and there are also
stand-alone apps (fi a2jmidi_bridge, a2jmidid,..) which can do the same.

> - Ralf
>
> *Offline now*
>
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Received on Fri Jul 16 20:15:05 2010