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Re: Audio-ISSUE-105 (MIDI timestamp resolution): timestamps in MIDI should use High Resolution Time [MIDI API]

From: Chris Wilson <cwilso@google.com>
Date: Thu, 7 Jun 2012 14:19:02 -0700
Message-ID: <CAJK2wqWa=V0UYDv606KxQiJj5AdaTLRz2-KeJ6KDaK4SwQgKXA@mail.gmail.com>
To: Philip Jägenstedt <philipj@opera.com>
Cc: Jussi Kalliokoski <jussi.kalliokoski@gmail.com>, Adam Goode <agoode@google.com>, public-audio@w3.org
I think the clock for MIDI actually has to be the system clock; the other
clock is tied to a particular AudioContext (and different audio contexts
may have different clocks, since independent audio interfaces might have
separate clocks/crystals).  I suppose it's possible we'd want to provide
AudioContext-hosted event at some point, but for now, I think the system
clock is the best place to host MIDI.

On Thu, Jun 7, 2012 at 1:16 AM, Philip Jägenstedt <philipj@opera.com> wrote:

> On Tue, 05 Jun 2012 18:57:29 +0200, Chris Wilson <cwilso@google.com>
> wrote:
>  Definite +1 to that.  Philip, what do you think of the timing type in
>> MIDI?
>>  Should we have it be in seconds like Web Audio, or milliseconds?  (Will
>> come back to the reference point on the other thread.)
> I don't know anything about MIDI and haven't looked at the spec, so I
> don't know. All else equal, I prefer to use seconds in new APIs, but the
> main issue here is surely which clock is used, not the units.
> --
> Philip Jägenstedt
> Core Developer
> Opera Software
Received on Thursday, 7 June 2012 21:19:33 UTC

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