[Rwp] midi clock, timecode and latency

[Patrick Perdue]

So, to add to this a bit, I have found the option in Reaper's midi 
outputs to offset midi events to a device by x milliseconds for each 
output. You can put in a negative or positive value. Unfortunately, all 
I can manage is to make things worse, as a negative value doesn't seem 
to make any difference at all, though it looks like it should.
It seems to me that the audio start/stop should be slightly delayed to 
fall in-line with midi if it's going to be like that.
I could do some tricks with ReDelay, but that's all a bunch of duct 
tape, and is only good for rendering. Surely that isn't necessary.

A quick search suggests others are also having this issue, and the quick 
fix seems to be increasing asio buffers to a stupidly high amount, which 
is, to me, not an acceptable workaround.
I have also found reference to another midi clock plugin. Maybe this 
will work, though that seems to be a stupid issue with the built-in 
stuff, and more to set up for each project.

Interestingly, the thread I found on the forum lists the raw text of 
this JS plugin, which is to be saved as a text file, then put into 
Reaper's effects folder.
It's something like 30 lines of code.

On 2/28/2015 6:15 AM, Patrick Perdue wrote:
> Hi all:
>
> I'm having fun trying to sync up four external sources to Reaper as a
> master clock, three keyboards and an external step sequencer to control
> CV inputs for an analog synthesizer. Yamaha Motif XS, Korg MikcroKorg,
> Arturia MicroBrute and Arturia BeatStep. The MicroBrute has it's own
> step sequencer, which I want to run independently of the CV out from the
> other sequencer to control various aspects of the synth, which can't be
> done with it's internal one.
> The problem I'm having is that, when I send play from Reaper, everything
> syncs up to project tempo and start/stop just fine, but all behind from
> the audio and metronome by about 50 MS or so. Audio latency is not the
> problem (running at 32 samples at 48 khz yields quite low latency
> there.) Same issue exists with a midi metronome.
> My step sequencer doesn't support MTC, so doesn't follow Reaper's
> transport, but that is to be expected.
> I've played with some of the midi latency stuff, but so far, haven't
> gotten anything to be more interesting.
> At least all the midi stuff is lined up with itself, but that's about
> the only good thing here.
> Anyone have suggestions? Has anyone here done much with clock to
> external hardware? I don't have any latency problems with just straight
> input/output of midi, only when trying to sync all this stuff up. I am
> using Reaper V4.76 32-bit, should that matter.