Re: Using "/@" Effectively
- To: mathgroup at smc.vnet.net
- Subject: [mg104306] Re: Using "/@" Effectively
- From: Szabolcs Horvát <szhorvat at gmail.com>
- Date: Tue, 27 Oct 2009 04:57:58 -0500 (EST)
- References: <hc38lq$iae$1@smc.vnet.net>
On 2009.10.26. 5:30, BenT wrote:
> Given:
>
> $Version
> "7.0 for Microsoft Windows (32-bit) (January 30, 2009)"
>
> miditofreq[n_Integer] := (440./64) 2^((n + 3)/12);
>
> and
>
> melody[p_Integer, d_Real] :=
> Play[Sin[miditofreq[p] 2 \[Pi] t], {t, 0, d}, SampleRate -> 44100,
> SampleDepth -> 16]
>
> I want to be able to use a list of pitch and duration values for a
> melody, and use it like the following, but cannot determine the method
> to Map them properly, as in this (non-working) attempt:
>
> Sound[melody[#1, #2]& /@ {{0, 1}, {5, 0.5}, {7, 0.5}, {12, 1}}, {0,
> 3}, SoundVolume -> .5]
>
> Can anyone show me the correct (or even a better) way to do so?
Use @@@ instead of /@, and change d_Real to d_ . "Real" means floating
point number in Mathematica, so 1 is not of Real type but 1.0 is.
But why don't you just use SoundNote[]?