Quadraphonic matrix decoder software

Similar to sq and ev4, qs can decode any matrix type quad encoded record along with synthesizing quad from a stereo source. Nothing sold today can play the quadraphonic matrix systems except that dolby surround systems can. Sq decoding with adobe audition for new converters start here. Decoders type i for reproducing matrix quadraphonic disc records this standard specifies the decoding operation for reproducing matrix quadraphonic disc records as defined in note 4. No special stylus or cartridge is required to listen to it in quadraphonic. A matrix decoder can not sense the high frequencies on a cd4 record, it can only synthesize the stereo output of a cd4 quadradisc lp. It was introduced by cbs records known in the united states and canada as columbia records in 1971. Sansui plans to make its qs decoder and vario matrix technology available to all inter ested manufacturers. In 1976, i had an idea for making a passive matrix decoder that goes after the power amplifiers and can decode all matrix systems. Qsregular matrix quadraphonic is compatible with pro logic ii. Matrix quadraphonic systems like qs and sq can be seen as the secam of quad.

Decode fichier software quadrophonic matrix decoder. Analog surroundsound is reborn on a new quadraphonic lp. Matrix decoding is an audio technology where a small number of discrete audio channels e. Some systems used a demodulator to decode discrete sound channels. The qs quadraphonic system was developed by engineer ryosuke itoh of sansui is a phase matrix system, as is ev stereo4 and dolby surround. I made crosstalk cancel type full logic qssq matrix decoder. I wont have a chance to try it out till later today, but has side wood pannels, made in japan, and was still brand new vintage in the box for only 58. Right red led group are displayed the results of detection of the sound source direction of s. Stereo lab now supports software decoding of cd4 quadraphonic lps. This example shows how to generate a stereo signal from a multichannel audio signal using matrix encoding, and how to recover the original channels from the. Other systems used matrix decoding to recover four channels from the two channels cut on the record. Has anyone tried a ms difference matrix to extract the rear channels. Laserdisc database view topic quadraphonic 4 channel. I know of an old analogue decoder called tate ii in hardware, but they are expensive and very old now.

The channels are generally, but not always, arranged for transmission or recording by an encoder, and decoded for playback by a decoder. For the so called matrix pseudoquadra lp systems as sq, qs, qm, rm, qr, you need only a decoder preampriaa corrector specific for the system chosen. Stereo to surround upmixing discussions related to synthesizing surround sound from stereo recordings using hardware and software methods. I have not had the equipment to decode them for playback for many, many years. The bbc later cooperated with the developers of ambisonics to produce bbcnrdc system hj. That way youll be able to decode at least 90% of matrix quad lps out there. I also want to be able to record the quadraphonic records i decode with. Were very excited to share it with you and hope that it. In june 2018 electronic musician suzanne ciani released the album live quadrophonic using the qs. Qsregular matrix quadraphonic is compatible with pro logic ii and circle surround, and. Aes elibrary quadraphonic matrix perspectiveadvances in sq encoding and decoding technology. Matrix decoding of ud4 michael gerzon pointed out 5 that matrix h will decode existing bmx discs e. This was based on tolerance zones designed to include modified versions of both matrix h and the prototype twochannel encoding of ambisonics, known as system 45j.

Stereo lab quadraphonics and ambisonics pspatial audio. Stereo lab jvc cd4 decoding in software pspatial audio. Discussion in music corner started by bill cormier, feb 27, 2016. I originally came up with a very complicated way of making an sq compatible recording using sound forge and the q.

Quadraphonic stereo sansui introduced the qs quad encode decode system in february 1972. While i have noticed that full logic sq decoders seem a bit. My passive matrix decoder that decodes all matrix systems. Left blue led group are displayed the results of detection of the sound source direction of qs system. At first, my intention was to build just the mc12p matrix decoder circuit, and feed its output to my amplifier. Subsequently, the nipponcolumbia umx matrix was brought into the standard, leading in 1977 to the uhj, now associated with ambisonics. Cd4 is not my favorite quad medium for various reasons. As to a software decoder for cd4, the real problem isnt math, it is the. Such ics will include sansuis unique qs synthesizer that converts al conventional 2 channel sources to 4channel sound quite. To accomplish this objective we are in the process of converting the vario matrix decoder into ics. I have over 100 quadraphonic lp records, a good percentage of which.

The decoder decodes to the four loudspeaker regularpolygon loudspeaker layout which was popular at the time. Stereo uhj and so on, all come down to the differing trade offs made between the perfect separation of the various fully complementary stylus movements and the crosstalk caused. Now that there is a better sq quad decoder available, im even more interested in filling those gaps. S t riddle you make an astounding job for this layout, im really love with your layout till now especially in vario matrix mode when listen to bread album its really take a fine job decode. But for the so called discrete quadraphonic lp systems really discrete 4 channel systems, realizing 4 independent sound channels. The problem with trying to decode sq or qs or any of the other matrix systems from lp is that getting. Qs records could give some quadraphonic effect, although far from accurate, when played on an sq decoder. Presenting audio samples of various 3d stereo and matrix encoded quadraphonic and surround sound systems. Playing sqencoded 4 channel lps through modern equipment. I have a collection of the old quadraphonic records. With matrix formats, the four channels are qudaraphonic encoded down to quadrahonic channels.

Apparently it still has lots of artifacts and the separation is as poor as an early matrix decoder. Unfortunately quad died around the same time that the decoders began to get somewhat good. If you like this software please consider a donation to continue its development. Theres software and scripts that can take a two channel sq source, process it. Mime tool is a simple interactive application designed to help you encode decode. This allowed for full channel separation, although such systems were prone to reduced record life. Sqtype quad is a matrix quad, as are the qs rm and ev4 types. Qs and sq with about 150 titles released on the rca label and about another 100 titles on other labels such as. Sq quadraphonic stereo quadraphonic was a matrix 4channel quadraphonic sound system for vinyl lp records.

Different approaches were used to bring out that neato matrix quad sound. Quadraphonic record decoding question sources analog. The suzanne ciani album, live quadraphonic, mastered by sedillo and cut to 12inch vinyl at 45 rpm by chris bellman and sedillo, will be available this summer via kamrans company, cykik, in a package roughly the size of a 2inch tape reel box that will include an involve audio hardware decoder. It is a sq encoded matrix disc, and will play with full fidelity on a stereo system. However, the sound coming out the speakers will usually vary from a little to a lot since each system used a slightly different approach at decoding encoded quad input.

Discussion in music corner started by paulisdead, feb 4. Wish me luck, herd, with that lottery ticket i bought. Dolby surround was based on the tate des itself an evolution of the cbs sq decoder. Decoding sqqs matrix quadraphonic lps with your pc. Unlike matrix quadraphonic systems, cd4 took a more radical approach. Cd4 decoders are becoming more and more expensive and hard to find. Qs or rmreal matrix as it was eventually called was technically the better of the 2 systems and was actually the first to market, but despite being freely licenced, was pretty much ignored by the mainstrean music industry. Qs aka rm 1970s surround sound audio quadraphonic audio. If distortion and noise are encountered when using this decoder. Is there any software codecs than can accuratly decode sq vinyl records and if so, how would i reenocde to playback on modern sourround systems. It was missing the instructions, but that shouldnt be a problem. A how to guide in encoding your own matrix quad mixes.

I also did not need the logic control circuitry for. Any matrixtype decoder will decode a matrixtype encoded record. Handmade qssq full logic quadraphonic decoder qs demo. Other systems, like the successful sq system developed by cbs in new york, use even more cunning arrangements such that the rear channels are encoded by circular movements of the stylus actually helical, because the circles are unwound as the record is turning.

None of the matrix systems are compatible so no one decoding process, be it hardware or software, can do the job accurately. Although it is considered obsolete, quad still sounds cool. This ensures high fidelity quadraphonic reproduction even with a simple matrix decoder. The decoding process depends on the system being decoded, each has their own dedicated processs using various pieces of software, etc. Playing quadraphonic records question steve hoffman.

So, use stereo lab matrix h decoding if confronted with one of these rare quadraphonic ud4 discs. Pink floyd atom heart mother quadraphonic page 2 steve. Decoding sqqs matrix quadraphonic lps with your pc polk. Decodingsoftware the reports are the sound is much better. The function is to allow multichannel audio, such as quadraphonic sound or surround sound. Quadrahedral or other modern analogues, and a decoder specific for the system the record is of. Often, qs is shown on quad equipment with the designation rm. For matrix systems, cartridges are the same as for 2channel stereo, but of a high quality, having a very high horizontal and vertical flexibility of suspension not piezo. Marcus junglass sq decoder is here, this is an offline decoder. Demodulating cd4 quadradiscs is now supported in stereo lab. My amplifier has component 4channel audio input sockets, with balance and volume controls so i did not need the gain control circuitry.

Quadrophonics is a technology developed and used in the 1970s that applies an encoding matrix to the four input channels lf left front, rf, lb left back and rb to record them. Stereo lab stereo sauce francinstien stereo lab francinstien tsym needledrop needle drop software equalisation recording charateristics quadraphonic quadraphonics ambisonic ambisonics sq qs quadraphonics quad binaural stereo blumlein cassette noise reduction in software dolby b dolby surround decoding loudness processing loudness war alastair macmaster richard. The qs vario matrix decoder, created by sansui in 1973 with its 20 db separation in all directions, and the 4 channel sound extracted by some qs matrix decoding software and. Any matrix type decoder will decode a matrix type encoded record. As to cd4 software decoding, i dont beleive it will rival. Surely this would be easier to reproduce in software like most dolby decoders are now. The function is to allow multichannel audio, such as quadraphonic sound or surround sound to be encoded in a. I was looking at what they are getting for used decoders on ebay and the price is just to high. Conversely, a demodulator can only convert those high frequencies to the audible range, it can not synthesize quad from any source. Well i know this isnt a fosgate, but today i received a realistic quadraphonic 4 channel decoder. Cd4 quadradisc has the 4th largest discography of commercial quad systems after. Quadraphonic audio reproduction on vinyl records was problematic.

Many recordings using this technology were released on lp during the 1970s. The release of this 180g vinyl disc is also quadraphonic and includes a hardware decoder manufactured with involve audio to decode two channels of audio from the vinyl disc back to the fourchannel recording with stunning results. The difference signals, used to separate back from front in the decoder. Although the first version of dolby digital was based on the same matrix decoding as sq quad, modern 5. I also want to be able to record the quadraphonic records i decode with hardware as well as my quadraphonic 8 tracks, so the sound cards need to provide me with 4 audio inputs. The classic cd4 decoder is selected as a processes in the quadraphonic decode mode options.