David, As long as the three unisons of any given note are anywhere NEAR each other, you're fine with just sampling on one string. After all, all you're doing is a coarse tuning. That said, one piece of advice that will be helpful/beneficial is to tune the A440 to your fork before you take the AAAAA sample. That will get you a better pitch correction because the RCT can more accurately determine the amount of inharmonicity.  HOWEVER, after you take the AAAAA sample, it's best to de-tune the AAAAA back to where they were prior to starting your pitch correction at A0. The RCT takes a moving 5-note average to determine overpull. If your A's are in up to pitch, you throw off the overpull on them, as well as the following 4 notes above. Rather than pulling a mute strip (which it doesn't sound like you use...) I just "tune" one A to a fifth below, then octaves from that. Paul <div>On 3/1/07, David B. Stang <<a href="mailto:stangdave@columbus.rr.com" target="_blank" onclick="return top.js.OpenExtLink(window,event,this)">stangdave@columbus.rr.com </a>> wrote:<blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"> I have a question about using the Reyburn Cyber Tuner in pitch-raise mode. The instruction booklet is not clear on this, and I realized yesterday that the procedure I've been using may be a little bit wrong. Overall, I follow the directions, i.e. I start at A0 and proceed all the way up from left to right. The question is what to do at each particular note. Here's what I have been doing (on a 3-string unison): 1. Mute the center and right string. 2. Play note (left string only) and allow RCT to sample it. 3. Tune left string to the RCT. 4. Mute right string only and aurally tune center string to left.     (Or, mute left and right and tune center to RCT) 5. Un-mute and tune right to center and left.     (Or, mute left and center and tune right to RCT) I realized that this is probably better: 1. Play note unmuted (all 3 strings) and allow RCT to sample. 2. Tune the strings to RCT as above. ( Here's another procedure which is probably silly: 1. Mute center and right. 2. Play left note and allow RCT to sample it 3. Tune left string to RCT 4. Mute left and right. 5. Press 'backspace' to erase previous sample. 6. Play center note and allow RCT to sample it.     etc.) The first procedure uses only the left string to sample and find the overpull; the second procedure uses the average (presumably) of the three strings. Clearly it doesn't make any difference if all 3 strings are equally flat, but if the left is significantly flatter than the others, the calculated overpull may be too much. (& vice-versa). Or, am I concerned about something that doesn't make a hill-o-beans difference? Thanks David B. Stang Columbus, Ohio </blockquote></div>