Distortion Problem

[Jackd]

Hi GDJ

My friend is elderly and not very computer savvy (but a great keyboard player) so I am doing this all at the end of a phone.

As I understand the volumes they are as follows:

Windows Mic input volume is set very low (6) and his keyboard output is set low (1) so the mic input does not overload and his volume to me as seen in the other live tracks icon is not in the red (i.e. if he put his keyboard volume up to say 3 - then I would get distortion)

1.  With an undistorted signal from him, then I can increase or decrease his volume in my mix using the fader on the loudspeaker of other live tracks.

2.    I can change my guitar volume in my mix using the fader on the loudspeaker of my live tracks

3.    I can change the final  headphone volume by changing the fader when I click the VOLUME button

My friend knows about the three volumes listed above and he assures me none of the signals are in the red

My friend can use option 2 or 3 to reduce his keyboard level in his headphones, but there is always distortion no matter what the levels are set to

many thanks,
alan..

Don't know if this is relevant, but when I first did some tests the sound in my headphones was distorted. Did some searching on the forums and saw a suggestion to reduce the buffer size in my interface software. I put it down to 24 samples and that stopped the distortion.