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Entries found for search: tempo

tempo : The speed of the pulse, or beat, of the music. See rhythm.

loop tempo : To find the exact tempo of a loop when you know the sampling rate that was used to make the sample (assuming you are using the sample at its original pitch), set the start point and the loop point at the desired points, and subtract the start pointís value from the loop pointís to find the length of the sample. For example, assume a two-bar 4/4 loop = eight beats, sampled at 32kHz. The loop (according to the sampler) is 135,500 sample words: (8 x 32,000 x 60) / 135,500 = 113.35 bpm.

tempo-dependent : A clock, such as the MIDI clock, which is dependent on the tempo of the music for tracking, i.e., the MIDI clock will transmit more MIDI clocks per second if the master sequencer increases the tempo, as compared with other synchronization signals which encode information about absolute time, such as SMPTE timecode."

tempo map : Data containing the initial tempo of a composition and the SMPTE timecodetimecode location of the song start, plus the degree and location of any subsequent tempo changes are stored in a tempo map. Usually the tempo map is built by the sequencer and stored along with sequence data.

temporal masking : A data reduction technique which takes advantage of the fact that a loud sound affects the perception of quieter signals both before and after it. If, for example, a relatively quiet signal occurs 10-20ms before a louder one, it may still be masked by the louder signal. This is called backwards masking. The hearing mechanism also takes time to recover from a relatively louder sound, and this creates a masking effect which extends up to 100-200ms after the masking signal signal has ceased, called forward masking. The length of the masking is related to the relative amplitude of the masking signal. To reduce data by using this technique, the input signal is divided up into blocks of samples usually around 10ms in length, and each block is analyzed for transients which act as temporal maskers. Most systems vary the length of the block to take advantage of both backwards and forwards masking. Also called time-masking. See perceptual coding.

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