High-quality multi-reed tremolo synthesis from single-note WAV/MP3 reed instrument samples.
Overview
Load a set of single-note WAV or MP3 reed-instrument samples and create two- or three-reed tremolo versions of them.
The converter analyzes the samples, sorts them from low pitch to high pitch, applies the selected tremolo settings, normalizes the finished samples, and exports them together in a ZIP file.
Interpolate missing notes? is enabled by default.
When enabled, missing semitones between the lowest and highest loaded notes are created from the closest available loaded sample in pitch.
Interpolated notes are identified in the sample list and are otherwise previewed, processed, and saved just like loaded samples.
If interpolation is disabled, the selected files must contain every semitone from the lowest note through the highest note.
Duplicate pitches are not allowed in either mode.
Beat Offset
Starting Beat Offset and Ending Beat Offset set the beat-offset range from the lowest note to the highest note.
In the two-reed modes, this pair controls the total frequency separation between the two reeds, as before.
In − Offset / Original / + Offset mode, separate slider pairs are shown for the − Offset Reed and + Offset Reed. Each pair independently sets how far that outer reed is detuned from the original center reed across the sample range.
Beat Offset Curve controls how the offset changes across the chromatic sample range.
Linear uses an even progression.
Curves 1–8 provide progressively stronger nonlinear curves.
In three-reed mode, both the − Offset and + Offset ranges use this same curve setting for interpolation.
Sync offsets is available only in three-reed mode. When checked, the + Offset range immediately matches the current − Offset range. After that, changing either Starting slider changes the other Starting slider to match, and changing either Ending slider changes the other Ending slider to match.
The graph shows the selected progression; in three-reed mode it shows both outer-reed offset curves.
Reed Tuning and Volume
Reed Tuning selects how the two reed frequencies are created.
− / + Offset splits the total beat offset equally below and above the original pitch.
Original / + Offset leaves the first reed at the original frequency and shifts the second reed upward by the full offset.
− Offset / Original / + Offset creates a three-reed MMM-style sound with the original pitch in the center. The − Offset and + Offset reeds have independent Starting and Ending Beat Offset ranges, allowing symmetrical or asymmetrical tuning around the original pitch. Both ranges default to 2 Hz at the lowest note and 5 Hz at the highest note.
Reed Volume Balance controls the balance between the two sides of the selected tuning.
In two-reed modes, it balances the two reeds: fully left plays only the first reed, fully right plays only the second reed, and 50 / 50 gives equal contribution from both reeds.
In three-reed mode, fully left plays only the original center reed and fully right plays only the combined lower and upper offset reeds. At 50 / 50, the original center reed and the combined pair of offset reeds contribute equally; the lower and upper offset reeds share the offset-reed contribution equally.
Reset beside Reed Volume Balance restores the balance to 50 / 50.
Output Level
LUFS Target sets the loudness target for each finished tremolo sample.
The default is −15 LUFS.
Normalization is applied after all reeds are mixed.
Output Level Trim applies an additional gain adjustment after normalization.
If the requested level would cause digital clipping, peak protection automatically reduces the output level; the completion message reports when this occurs.
Output samples are mono, 44.1 kHz IEEE 32-bit floating-point WAV files.
Reset All restores all converter settings to their original defaults, including both three-reed offset ranges to 2 Hz / 5 Hz, Sync offsets to unchecked, and Reed Volume Balance to 50 / 50.
All converter settings are automatically saved and restored the next time you use the tool.
Sample List and Pitch Detection
The sample list is shown in detected pitch order.
It displays the source LUFS value, detected note and fundamental frequency, total Hz and cents offsets, and the individual reed frequencies and cents offsets used for that sample. In three-reed mode, the individual reed values are shown in − Offset / Original / + Offset order.
Recognizable note names in filenames, such as C4, F#4, and Bb3, are used when available.
Preview
Select a sample from the Preview menu, or use Previous and Next to move through the samples.
Play Original plays the source sample and Play Tremolo previews the generated tremolo using the current Beat Offset Curve, Reed Tuning, Reed Volume Balance, and output settings.
Original and Tremolo previews automatically loop continuously until stopped.
While a preview is playing, its Play button changes to Stop Play; click it again to stop.
Starting Original while Tremolo is playing, or Tremolo while Original is playing, automatically stops the current preview first.
Selecting a different note also stops playback.
If a tremolo preview is playing and you change a tremolo or output setting, the converter regenerates the preview with the new setting, and restarts that tremolo note.
Converting and Saving
Click Convert All & Download ZIP to process the complete sample set.
Enter the ZIP filename when prompted.
Loaded samples keep the same filename as their original sample, with a .wav extension.
Interpolated samples use flat-based note names such as Db3.wav and Gb4.wav.
About
This tool was created by
Michael Eskin
If you find it useful, please consider a contribution via
Michael Eskin's Tip Jars