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Free DSP Programs

The following programs are free to use under the terms of the Spin Semiconductor Open Reverb License for both personal and commercial applications. If you would like to share your own program, please email us. You must agree to release your program under the Spin Semiconductor Open Reverb License to submit it.

Please note that many of these programs output only the processed signal and as a result the output should be mixed back in with the dry signal.

FV-1 -- SPN1001
Code snippets
Program NameDescriptionSubmitted BySourcePDF
RMS limiterApprox 10dB limiting range, stereo I/O, common control (to maintain image)Keith Barrrms_limiter.spn
RMS limiter/expander exampleSimple RMS limiter/expander exampleKeith Barrrms_lim_exp.spn
Mini reverbMini reverb example,Keith Barrmin_rev1.spn
Soft knee RMS limiterSoft knee RMS limiterKeith Barrrms_soft_knee.spn
Simple limiterSimple limiter, -12dB threshold, peak detectingKeith Barrsimp_limiter.spn
+/-20dB gain/lossExample program for +/-20dB gain/lossKeith Barrthru_gain.spn

Disco/DJ programs
Program NameDescriptionSubmitted BySourcePDF
Reverb+HP+LPReverb plus 2-pole high-pass and 2-pole low-passDave Spinklerdance_ir_h_l.spn
Reverb+Flange+LPReverb plus flange plu 4-pole low passDave Spinklerdance_ir_fla_l.spn
Reverb+Pitch+LPReverb plus pitch plus 4-pole low-passDave Spinklerdance_ir_ptz_l.spn

Program NameDescriptionSubmitted BySourcePDF
Active crossoverActive cross-over program for speaker equalization. Multiple bands of parametric EQ, etc.Keith Barract_xover.spnAN-0002.pdf

Program NameDescriptionSubmitted BySourcePDF
OEM1portable mixer programsKeith Barroem1.zip

Other effects
Program NameDescriptionSubmitted BySourcePDF
DistortionExample distortion moduleKeith Barrdist.spn
Sine wave generatorSine wave generator, uses POT0 and POT1 for coarse and fine adjustment, POT2 for amplitude controlKeith Barrsingen.spn
Battling LFOsWhat happens when one LFO controls another, and that controls another and that controls another and that controls the first one?Keith Barrbattling_lfos.spn

Pitch :: Shifting
Program NameDescriptionSubmitted BySourcePDF
ROM pitch shiftPitch shifting program from the FV-1 internal ROMFrank Thomsonrom_pitch.spn
ROM pitch-echoPitch-echo program from the FV-1 internal ROMFrank Thomsonrom_pt_echo.spn
Key-revPitch + reverb for karaoke appsKeith Barrkey_rev.spn

Reverb :: Combined effect
Program NameDescriptionSubmitted BySourcePDF
ROM flange/reverbCombination flange/reverb program from the FV-1 internal ROMKeith Barrrom_fla_rev.spn
ROM reverb/chorusReverb/chorus program from the FV-1 internal ROMKeith Barrrom_chor_rev.spn
ROM tremolo/reverbCombination tremelo/reverb program from the FV-1 internal ROMKeith Barrrom_trem_rev.spn

Reverb :: Plate
Program NameDescriptionSubmitted BySourcePDF
Very tight plateVery tight plate reverbHarmon Groldrev_pl_3.spn
Tight plateTight plate reverbHarmon Groldrev_pl_2.spn
Plate reverbPlate reverbHarmon Groldrev_pl_1.spn

Reverb :: Room
Program NameDescriptionSubmitted BySourcePDF
ROM reverb 1Reverb 1 program from the FV-1 internal ROMKeith Barrrom_rev1.spn
ROM reverb 2Reverb 2 program from the FV-1 internal ROMKeith Barrrom_rev2.spn
Reverb/RT/D/FReverb program that allows three controls, reverb time, diffusion and high/low frequency dampingKeith Barrrev_rt_d_f.spn

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