via this auction
- Matrix - The Voice Coder
- Matrix The Voice Coder Software
- Matrix The Voice Coder App
- Matrix The Voice Coders
You can find a demo of one here.Matrix Sound Effects (405) Most recent Oldest Shortest duration Longest duration Any Length 2 sec 2 sec - 5 sec 5 sec - 20 sec 20 sec - 1 min 1 min All libraries Airborne Sound Soundmorph 0:11.
After your MATRIX Voice is setup, visit Ecosystem Overview for information about the three programming environments available to you in the MATRIX platform. All 3 programming environments are compatible with the MATRIX Voice & MATRIX Voice ESP32 version on a Raspberry Pi. Coding (LPC)-Introduction 2 LPC Methods. LPC methods are the most widely used in speech coding, speech synthesis, speech recognition, speaker recognition and verification and for speech storage – LPC methods provide extremely accurate estimates of speech parameters, and does it extremely efficiently. Matrix quantization extends the theory of vector quantization for voice coding to take advantage of the phonological and phonotactic properties of speech. The speech signal is first modeled by LPC spectra at 10‐ms time intervals. By adopting an acoustically defined (and demisyllable like) automatic segmentation procedure, consecutive LPC. Matrix is an open network for secure, decentralised communication, connecting 18M+ users over 45K+ deployments. Governed by The Matrix.org Foundation, the Matrix protocol is an open standard with open source implementations, supporting a vibrant developer ecosystem. Download files and build them with your 3D printer, laser cutter, or CNC. Thingiverse is a universe of things.
'Up for sale is the rare Voice Spectra Vocoder produced by Sky Soundlab (the same unit alternatively produced by Seekers).
It is in very good used condition with minor rack rash and some cosmetic wear.
It is in fully working functional condition.
Excellent youtube demo linked, it is not of this actual unit!
Comes with power cable. Some more info below:
This has a very clear sound for an analogue vocoder, a big part of why it makes voices so intelligible is the syllable function which inserts noise bursts into the signal for “s” and “sh” syllables. This is a pretty rare feature on an analogue vocoder, and it really helps with intelligiblity. The syllable function is also really cool for creating rhythms.
The Voice Spectra has good reputations in Japan for clear extent, high timbre, and for Speech Tracking Function (STF). STF is basically a pitch- to-voltage converter which functions by reading the glottal pulses of the speech signal. The control voltages from the output of the pitch extractor are fed to the VCO, so that this follow the cadences of the speech signaI. STF is an interesting additional facilities only to be found on more expensive vocoders like EMS.
Everyone familiar with vocoding will appreciate the Voice spectras compressor and Voiced/Unvoiced detector*.
The Voice spectra is a high quality studio-vocoder, appreciated by the staff at music studios, professional musicians, etc. in Japan. The articulation of the output signal is extremely good, being distinguished by remarkable clarity and distinctiveness. This quality of articulation, among other things, is what distinguishes SKY soundlab from other less sophisticated vocoders like the MAM VF11.
Technical specifications:
Mic-line inputs: MIC -40dBm / 47K Line: 0dBm / 20K
Synthesis/Instrument Input: 0dBm / 100K
Output: +0dBm
Filterbank:12 Analysing filters and 12 Synthesizing filters
#01 90 - 130 (Hz)
#02 130 - 190
#03 190 - 280
#04 280 - 410
#05 410 - 610
#06 610 - 900
#07 900 - 1340
#08 1340 - 1950
#09 1950 - 2800
#10 2800 - 4100
Matrix - The Voice Coder
#11 4100 - 6070#12 6070 - 8900
Internal excitation sources: white noise generator and sawtooth oscillator (20-900Hz). Both may be gated by the voiced/unvoiced detector. Oscillator frequency fixed or tracking mode.