Re: the Yamaha p-90 (and I apologize for being fairly ignorant about electronics), there are two 1/4" outputs - L/L+R and R. I can't determine the purpose of these, unless it's just a way to send the top of the keybd to an additional amp or channel. Both outputs seem to carry both sides of the kybd. Regardless of how I use these outputs I don't hear a difference in sound. Also, I have been trying to play the bass in one amp and the piano in another amp(split keybd)so that I'd have separate tone and volume controls. Yamaha says it's not possible. That just doesn't seem right. Any thoughts?

The audio outputs on your keyboard seem pretty standard. The left channel also serves as a mono channel (hence L + R).

Yamaha is correct in saying you can't send different keyboard regions to different amps, if you only have the outputs you list. The only thing I could suggest is panning one sound hard right and the other hard left and sending L and R to two different amps. But I don't know if your keyboard will allow individual panning of sounds. I've owned modules that had multiple outputs to which you could assign individual patches, but I haven't come across lower-end keyboards that offered the same.

each output isn't supposed to carry a diferent part of the keyboard but whatever would get sent to one speaker if you try recording in stereo you'll notice that while both channels will have a similar look they won't be exactly the same this is because there is a bit more bass coming from the left & a bit more treble from the right but it definately isn't all the left keys on left speakers etc it's just something that makes it blend better

Those are stereo outputs. They're usually used for recording. The idea is to match the stereo panning you hear when you plug headphones into the keyboard. For live play, it's more common to use the mono L+R output and send it to the foh mixer. But some keyboard players use a pair of powered monitors like Mackie's or JBL G2's to the immediate left and right of their keyboards. Lately I've been seeing live keyboard players just send that L+R mono out to their own Bose PAS pole sitting right behind them.

If you really want to send your zones and splits to different places, that's usually done with multi-zone midi controllers and external midi boxes with their own audio outs. Though I bet something like the Korg Oasis with it's 10 outputs might be able to do it all by itself.

Howard

The P90 only has master/final mix outputs and no assignable outs. This means that the outputs labeled L/L+R & R, are the final outputs of all the voices in the mix/performance including effects, eq, etc.

There is no way to split the mix into seperate outputs on this board.

If out want a mono mix output, ensure that ONLY the L/L+R jack has a plug in it. If there is a plug in both the L and R sockets then each will send its respective signal (i.e. stereo) (yes they are different).

Rodney

Thanks for all your comments! Walt

The way the samples are reproduced on most digital pianos, certainly the P90 as well, the field of depth, the perceptual part about getting a grand piano sound, is only decent sounding IF it is in stereo. Listen to your piano sound through headphones and you will find the sound that really makes the thing tick: stereo reproduction of a grand piano. Try to simulate this headphone sound in all "live" perfromances from your P90, otherwise you are only getting half (that's 50%) of the intended sound of the instrument.

My son also told me that I really needed to hear my P90 via the headphones to fully appreciate it. Unfortunately, my daughter 'borrowed' the adapter to fit my small plug into the 1/4" headphone jacks. Having just ck'd the piano, I see it uses 2 jacks, so I guess I should have headphones w/2 jacks?

I think the reason you have 2 headphone jacks is so 2 people can listen - you'd use this for playing a duet.

I think the sound from each is the same.

OK, thanks. Then I'm all set once I replace the adapter!