Redmoon Converters Converta compassos ou batidas em segundos, milissegundos e samples em qualquer BPM e fórmula de compasso. Perfeito para cortar loops e stems para samplers e DAWs.
| Bars | Beats | Seconds | Milliseconds | Samples |
|---|
1 beat = 60 / BPM seconds (where 1 beat = a quarter note in x/4, an eighth note in x/8). 1 bar = numerator beats. Samples = seconds × sample rate.
For 6/8, 9/8 and 12/8 a "beat" here means an eighth note. Convert to dotted-quarter pulses by grouping in 3s.
Length in seconds is beats × (60 ÷ BPM), where the beat is defined by the time signature's lower number: an x/4 signature counts quarter notes, and an x/8 signature halves that to count eighth notes. Beats come from bars × the upper number, and the sample count is seconds × sample rate, rounded to the nearest whole sample. At 120 BPM in 4/4 that makes four bars exactly 8.0000 seconds, 8000 ms, and 384,000 samples at 48 kHz.
BPM and the bar count do the heavy lifting, with preset buttons for 1, 2, 4, 8, 16 and 32 bars and a bars field that accepts quarter-bar steps. The Bars and Beats fields stay synchronised in whichever direction you last typed, so editing beats back-calculates the bars. Sample rate, offered at 44.1, 48, 88.2, 96 and 192 kHz, changes only the sample column — pick the one your session actually runs at before trimming anything.
In 6/8, 9/8 and 12/8 the calculator counts eighth notes, which means a 12/8 bar at 120 BPM is twelve eighths of 0.25 seconds, or 3 seconds. If your DAW instead shows tempo in dotted-quarter pulses, you will be out by a factor of three. Everything also assumes one fixed tempo with no swing or tempo automation, and sample counts are rounded, so a tempo that does not divide evenly into the sample rate leaves a fractional sample at the loop point.
Exactly 8 seconds in 4/4, which is 8000 ms and 384,000 samples at 48 kHz. Because 120 BPM gives a round half-second beat, every power-of-two bar count at that tempo lands on a whole number of seconds, which makes it a convenient tempo for loops.
At 44.1 kHz it is exactly 75,600 samples. At 48 kHz the same bar works out at 82,285.7, which the tool rounds to 82,286, so a trimmed loop is a fraction of a sample short and will drift very slightly over many repeats.
Not in time, only in samples. The seconds and milliseconds figures depend purely on BPM, time signature and bar count. The sample column exists because samplers and audio editors often want a length in samples rather than a length in time.
It treats the beat as an eighth note, so BPM is counted in eighths and a 6/8 bar is six of them. If you think of 6/8 as two dotted-quarter pulses per bar, group the eighths in threes, or enter three times your dotted-quarter tempo.
Yes. The Bars field steps in 0.25 and accepts any fractional value, and the reference table starts at a quarter bar. Alternatively type directly into the Beats field, and the bar count is recalculated for you by dividing by the time signature's upper number.
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