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Checking Tempo Stability of MIDI Sequencers

Sequencers are involved with the majority of the music made in the 1990s. We usually think our machine has perfect timing. It is assumed that the tempo of the machine is steady; and the time in between each beat is consistent. After all, it is a machine so it does not rush or drag. Test results show that most sequencers are not steady-timing errors (from minute to major) exist in most machines. Measurements are shown for several models of sequencers and drum machines, including some pre-MIDI units. A simple test setup is presented to allow the reader to monitor the timing accuracy of his equipment and take steps to minimize timing errors.

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