Re: Play Command Error
- To: mathgroup at smc.vnet.net
- Subject: [mg105578] Re: [mg105558] Play Command Error
- From: Bob Hanlon <hanlonr at cox.net>
- Date: Thu, 10 Dec 2009 04:54:59 -0500 (EST)
- Reply-to: hanlonr at cox.net
notes = Table[N[(440/64)*2^((n + 3)/12)], {n, 60, 72, 1}];
Attributes[Play]
{HoldAll,Protected}
Since Play has attribute HoldAll you should use Evaluate.
Play[Evaluate[Sin[# 2 Pi t] & /@ notes], {t, 0, .5}]
Bob Hanlon
---- BenT <brtubb at pdmusic.org> wrote:
=============
I'm using v7. Please try this code:
ClearAll["Global`*"]
notes=Table[N[(440/64)*2^((n+3)/12)],{n,60,72,1}];
Play[Sin[# 2 Pi t]&/@notes ,{t,0,.5}]
Sound::ssnm: A good PlayRange could not be found since most of the
samples are not evaluating to machine-size real numbers. >>
I cannot understand why this error message is produced. Can anyone
help? The values for the "notes" are certainly machine-sized! What's
causing the Sin[# # Pi t] expression to NOT produce valid resuls?
--- Benjamin Tubb