I tried that with the Montage standalone with no others synths directly to the headphones. No stuttering. Do you also hear it then?

Hello Stefan - no stuttering on the headphones, which I why I blamed the main output cables or the mixer to start with. Changed the cables - same problem. By-passed the mixer - same problem. Changed the amplifier - same problem. But no problem on the headphones. It's a bit weird, and not important in the Grand Scheme of things - I just don't like mysteries. Very akin to a faulty contact - but why just those two? (So far!). I've plugged and unplugged several times, and twiddled all the relevant knobs and sliders - still there. Same with standalone (using main outputs). OK on headphones. Some kind of glitch somewhere, but wondered if anyone else had found it?

Maybe record the stuttering and upload to clyp.it so it's more clear exactly what you hear. Does adding a HPF help? High pass filter. Not sure why low volume would make a difference. But I'm wondering if there is a frequency response issue with those little speakers and not sure your mixer provides the crossover. It's a shot in the dark.

Hello Jason - I checked the 'Strings' library on the Montage, and several other pfs (performances) have the same problem, though most are OK. The 'Piano' library is fine - though I was intrigued to find a CP-80 on both the Montage and the Tyros 3 - and also on the Korg (they call it a 'CP-8080'). Out of curiosity I compared the three. Both the Tyros and the Korg presented well, clear, confident, and strong. The Montage was OK (not as convincing) except for the C3 - C4 octave (Montage 7), which was distorted and muffled. Almost certainly an amplifier problem, I'd think, but I'd have expected Yamaha to ensure the Montage was compatible with their own speaker set!

My mixer is a pre-amp 4 channel with voice-over etc: - all channels are fed into the 'Line In' sockets of the Tyros 3, so the signal cross-overs should be identical. Haven't tried the HPF, but I don't think it'll solve it. Did try an interference suppressor, but that made no difference either. It's more interesting than annoying - something I can fiddle with when there's nothing else on the go.

You lost me on the 'clyp.it' upload! I'll look into that, thanks ...

Clyp.it ( http://clyp.it) is what I use to send my recordings over. I just record what's coming out of my studio speakers with my laptop's "crummy" microphone which generates a WAV (edit: no, it creates a m4a) file. I use the recorder that comes with Windows. I "surf" to clyp.it and upload the WAV (edit: I mean, m4a) file - and that's it. Now anyone can play my recording. No signup, account, etc needed.

Hi, I just checked playing over the main outs going through a Mackie mixer to a box, no problem for me either. I second the proposal to record and upload.

If Montage is going into Tyros as a MIC IN - and properly trimmed - then the HPF suggestion should not apply as Tyros should be handling the crossover between the subwoofer and "satellite" speakers (L/R) internal. The HPF was if you had hooked those up to Montage outputs directly - at the time, I wasn't keeping up with your connection blueprint but offering those shots in the dark in case speaker response was a component of the noise you hear.

I imagine you've experimented with lowering the level of your mixer to avoid clipping (which doesn't match the "low level", I know). Turn compression off if you have onboard effects on that mixer. Just turn them all off. You want a dry signal. Take out the mixer and run directly from the Montage to the Tyros. Make sure the levels are set appropriately both from Montage output to Tyros gain (trim).

It's probably best to minimize the setup first and take out unnecessary items from the signal chain like the mixer. Just a single cable from Montage to Tyros. Needs to be unbalanced since that's what the Tyros expects.

When you add the mixer - just add it by itself without anything else connected to it other than the Montage. Go step by step. When you do this, you'll be adding a cable. So be sure you test / swap that for a spare if you can (assuming the problem was not there without the mixer and is there with the mixer) and if this still has the problem, move to the mixer settings - maybe different input ports - etc.