<html> <body> You can practice tuning one of the unisons and leaving the others to tune back to after you've done your thing. Andrew At 03:59 PM 9/29/2004 -0400, you wrote: <blockquote type=cite class=cite cite>I would not suggest practicing your tuning on someone elses piano& especially if you want to stay friends with them.   R.Cromwell Cromwell's Piano Service Detroit,MI   <hr> <div align="center"></div> From: pianotech-bounces@ptg.org [<a href="mailto:pianotech-bounces@ptg.org" eudora="autourl">mailto:pianotech-bounces@ptg.org</a>] On Behalf Of Matthew Todd Sent: Wednesday, September 29, 2004 2:13 PM To: Pianotech Subject: Re: Octave Tuning   Thanks for the replies.  I am practicing my tuning on a 1913 Hinze upright.  Is that doing me more harm than good here?  I think it is hard to hear lots of stuff on that piano, but then again, I am a beginner, so I don't know if it's more the piano or more me not having trained ears yet.  I know lots of families with much newer pianos, should I try to hook up with one of them and maybe work it out with them to practice my tuning on it?   Matthew BobDavis88@aol.com wrote: <dl> <dd>Matthew writes: <dd>When I tune the temperament octave (A3-A4), it needs to be a 4:2 octave, correct?  </dl>No. Read the many replies which said that it should usually be wider than that. <dl> <dd>And one way to test this octave is to play the A two octaves above the lower note as the test key, to hear the partials in the octave, am I right? </dl>Not exactly, but read Don Rose's comments on ghosting. <dl> <dd>  If the octave you are testing has no beat whatsoever, you have a perfect temperament octave, is this true? </dl>No. There is no such thing as a beatless octave. An octave which is not beating at one level, such as 4:2, will be beating at all other coincident partials, such as 2:1, 6:3, 8:4. The higher the beatless coincident is in the chain, the wider the octave. A good compromise octave is usually pretty quiet, though,   Matthew,   If you have kept this trail of posts on octave tuning, please go back and re-read it, and the links to which you were referred, including the ones to the AccuTuner manual Appendices F and H. People are happy to spend time helping you, but you've got to do your homework and read the replies. At the risk of repetition, I include, directly below, a copy of my post from last week on this subject: Bob Davis ------------- Matthew's original question was how to tune a 4:2 octave. Several people, myself included, sent the tests, aural and visual. Whether that [meaning 4:2] is appropriate for the temperament octave on a particular piano is a second question. Tuning so that "the 10th is just noticeably faster than the third" might produce a good width of octave, but it is NOT a 4:2. [It's wider]   A clean 4:2 octave IS wide at 2:1, and narrow at 6:3. Most aural tuners naturally gravitate towards a temperament octave that is very slightly wide of 4:2 ("the 10th is just noticeably faster than the third"), which will be substantially wide of 2:1 and a tiny narrow of 6:3. This gives an octave that is pretty clean-sounding, and produces fifths which are pretty clean and fourths that aren't too trashy. Any octave size can be divided into 12 equal half steps. A true 4:2 octave will produce cleaner fourths and more movement in the fifths, and on most pianos will be unnecessarily narow. However, on some pianos with high inharmonicity, a wide temperament octave added to a clean octave below, will produce a double octave that is too noisy. It's a balancing act. <div align="center"> </div> Do you Yahoo!? <a href="http://vote.yahoo.com">vote.yahoo.com</a> - Register online to vote today!</blockquote></body> </html>