Touch Tone, cont.

I'm sorry about the illegible tables in my post about Touch
Tone pitches and intervals yesterday. The problem seems to be
caused by tabs and carriage returns in text originally
written in Word and converted to ascii for upload.
(The =09 codes are tabs, the =20 CR's.)

The CR's are a bit of a problem as word-wrapping seems erratic
without them.

I have reformatted the tables and will send them to
anyone who requests them (or repost the message if there
is sufficient interest). I think John Loffink's post pretty much
covered the essentials, however.


--John

>Note that the tones were specifically designed to avoid harmonics.

Ivor Darreg claimed that "DTMF" pitches coincided *fairly* well with 14TET.

Also, there is a tone for each row and a tone for each column. Each
button sounds two (ideally) sine waves, and one of the two tones is
identical for each button on the same row, or on the same column.

Military phones have a fourth column, by way.