Mojo
Mostly harmless
1. CLAIM:
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2. REQUIRED EQUIPMENT :
a) 1 PC
b) 1 Metronome
c) 1 Tone Generator
d) Sound-proof room
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3. Method
a) Using a Samsung PC Laptop, and using the built-in microphone and "Sound Recorder" software, I shall make a recording of both the instruments playing simultaneously.
b) On playback (using external speakers) both noises from the instruments should be heard at the beginning of the recording. Within 4/5 seconds into the recording, the noise from the tone generator will (if successful) disappear from the recording, leaving just the ticking of the metronome behind.
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You'll also need a notch filter.