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I would like to create a chord using multiple instruments. This started as an attempt to explain music to a friend but my curiosity has taken over. I am familiar with the SoundNote function.

I know that SoundNote can create a chord using the same instrument:

Sound[SoundNote[{"C4", "G3"}, 1, "Harpsichord"]]

And it can create a series of notes with different respective instruments:

Sound[{SoundNote["C", 0.5`, "Oboe"], SoundNote["G", 0.5`, "SynthVoice"], SoundNote["C5", 0.5`, "Organ"]}]

What I'm wondering is if there is a way to play more than one sound with specific notes at the same time.

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up vote 10 down vote accepted

This example in Documentation exactly answers your question. You just need to specify overlapping time intervals. Lets expand your specific case. Below after every second a new instrument will come in and they will all end at the same time.

Sound[{SoundNote["C", {0, 4}, "Oboe"], 
       SoundNote["G", {1, 4}, "SynthVoice"], 
       SoundNote["C5", {2, 4}, "Organ"], 
       SoundNote["E3", {3, 4}, "VoiceAahs"]}]

enter image description here

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Anyone ever made the Dr Who theme with Mathematica? (serious question) – Mike Honeychurch Dec 10 '12 at 8:17
@MikeHoneychurch if someone would dare - they need to read Chapter 9 of Mathematica Cookbook by @SalMangano - some excellent examples there. – Vitaliy Kaurov Dec 10 '12 at 8:52
@MikeHoneychurch Import[""] (Mathematica 9, Who knows about 8) :) – cormullion Dec 10 '12 at 9:44

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