dexed ~ Frequency Modulation Synthesizer


Dexed is a multi-platform, multi-format plugin synth that is closely modelled on the Yamaha DX7. Dexed is also a midi cartridge librarian / manager for the DX7.

Features:

  • Multi platform (OS X, Windows or Linux) and multi format. (VST, AU, LV2)
  • The sound engine music-synthesizer-for-android is closely modelled on the original DX7 characteristics.
  • 144 DAW automatable DX7 parameters available from one single panel.
  • Fully supports DX7 input and output Sysex messages; including controller change. This means that you can use this with a native DX7/TX7 as a patch editor and sysex manager.
  • Each operator has a realtime VU meter so you know which one is active.
  • Can load or save any DX7/TX7 sysex programs. It is also possible to save a single program into a different sysex file.

asb2m10.github.io/dexed
github.com/asb2m10/dexed

JuceOPLVSTi ~ FM Synthesizer VST


Classic game sounds in VST form. As heard in late 80s / early 90s sound cards. Powered by DOSBox emulation.

JuceOPLVSTi

bsutherland.github.io/JuceOPLVSTi
github.com/bsutherland/JuceOPLVSTi

HOLMImpulse ~ Frequency & Impulse-response Measurement


  • Measure Impulse-response
  • Measure Phase-response
  • Measure Frequency-response
  • Measure Harmonic Distortion (THD)
  • Make bandwidth limited measurements with no phase-errors
  • Compare measurements
  • Import Frequency-response & Impulse-response
  • Export Frequency-responses & Impulse-responses
  • Use open formats for saved files (zip, wav/flac, txt)
holmimpulse

www.holmacoustics.com

www.diyaudio.com/community/threads/holmimpulse-measuring-frequency-impulse-response

Resources:

Note: It appears this software is no longer available from the original source.

Foobar2000 & MathAudio Room EQ


The frequency response of your room is very different in every point of the room. “Good” equalization in one point can worsen the sound in the neighboring point. Single-point equalization is not reliable and cannot be used in a professional room correction system. On the other hand, multipoint equalization is not simple; both the volume and the phase of the testing signal are very different in different points of the room. Simple averaging is not applicable. MathAudio Room EQ applies a state-of-the-art multipoint correction algorithm which ensures the best possible improvement in every point of the listening area.

  • Corrects deficiencies of room acoustics (multipoint compensation).
  • Corrects acoustic imperfections of speakers.
  • Avoids the pre-echo (pre-ringing) problem of conventional convolver-based room correction systems. The absence of pre-echo ensures the neutrality of the sound.
  • Works in rooms, halls and outdoor venues of any size.
  • Works with zero latency. Perfect for live performances and studio monitoring.
  • Doesn’t delay the audio track when playing video.
  • Corrects both amplitude and phase components of frequency response.
  • Quells resonance peaks of frequency response while leaving the deep notches.
  • Avoids the overcompensation which happens in conventional linearizing room correction systems.
  • Manually adjustable level of compensation allows one to reach the maximum transparency of the sound.
  • Supports full range of sample rates from 44,056 kHz up to 384 kHz. All sample rates are supported without resampling to avoid any possible loss in quality.
  • Includes a custom target curve feature.
  • Applies 64-bit signal path throughout.
  • Works with USB measurement microphones (e.g. MiniDSP UMIK-1 or Dayton Audio UMM-6) or standard measurement microphones (e.g. NADY CM100 or Dayton Audio EMM-6).
    Supports microphone calibration files.
  • Applies a patented method of frequency response correction.
  • Freeware Foobar2000 Component

mathaudio-room-eq

mathaudio.com/room-eq

FreqAnalyst ~ Spectrum Analyzer VST


Blue Cat’s FreqAnalyst is a free spectrum analyzer plug-in that lets you monitor the spectral content of your audio signal in real time.

This plug-in has been designed to provide extreme smoothness and high resolution for both time and frequency: unlike most spectrum analyzers, Blue Cat’s FreqAnalyst is able to display continuous variations even with a very high frequency resolution, thanks to its unique smooth interpolation algorithms.

Most aspects of the audio to frequency display conversion can be managed, which lets you total control over the monitoring. A special thresholding system has been developed to help you see the important parts of the spectrum easily. In case you need extra precision in a particular frequency range, you can zoom the display and check the part of the graph you are interested in.

freqanalyst

www.bluecataudio.com/Products/Product_FreqAnalyst

References:

en.wikipedia.org/wiki/Spectrum_analyzer

LINGOT ~ Linux Instrument Tuner


LINGOT is a musical instrument tuner. It’s accurate, easy to use, and highly configurable. Originally conceived to tune electric guitars, it can now be used to tune other instruments.

It looks like an analogue tuner, with a gauge indicating the relative shift to a certain note, determined automatically as the closest note to the estimated frequency.

  • It’s free software. LINGOT is distributed under the GPL license.
  • It’s really quick and accurate, perfect for real-time microtonal tuning.
  • Easy to use. Just plug in your instrument and run it.
  • LINGOT is a universal tuner. It can tune many musical instruments, you only need to provide the temperaments. For that purpose, it supports the Scala project .scl format.
  • Highly configurable via GUI. It’s possible to change any parameter while the program is running, without editing any file.

lingot-white-main

www.nongnu.org/lingot

Audio Frequency Signal Generator ~ Windows Tone Generator


Uses your PC sound card to create audio frequencies in the range 100 to 15000 Hz.

Tone Generator

www.ringbell.co.uk/software/audio