Thursday, October 03, 2013
Simple h/w vs s/w oscilloscope comparison for audio use
Published on Oct 3, 2013 Phil Tipping·55 videos
No audio in the video. Posting for informational purposes for those interested. A scope is a great thing to have on hand when going over synth basics with friends and family new to synthesis. There are scopes available for iOS as well.
"If you've not tried a s/w scope before, this simple side-by-side demo shows a variety of audio waveforms in both.
The h/w scope is a Tektronix 475 (a bit blurred due to camcorder focusing); the s/w scope is a free one called Soundcard Scope 1.41 by Christian Zeitnitz running on a Windows XP PC - other products are available. Test waveforms were generated from a Dotcom modular synth using the Q106 VCOs and Q108 VCAs.
This s/w scope takes its input from the PC's sound card, in this case an M-Audio Delta, and uses the left & right channels to provide 2 independent displays.
The main disadvantage with the s/w scope is the restricted frequency response due to the soundcard. The lack of DC coupling limits the usefulness for slow moving ADSR envelopes or measuring DC offsets, but it may be possible if cards are available with DC inputs (cards with DC outputs do apparently exist, as exploited by Expert Sleepers' Silent Way for generating CV levels for synth control).
Apart from that, the s/w scope seemed adequate for non-critical use and also provided lots more 'extras' such as easy frequency measurement and freq/fourier analysis plots. This particular program also has a built-in 2-channel signal generator which can be looped back to itself internally so you can explore waveshapes & Lissajous figures without any external gear."
Roland MC 303 demo #8 groovebox electro jam -- MIDERA
Published on Oct 3, 2013 acemonvw·62 videos
"Roland MC 303 groovebox demo
Song: The hollow warning
Artist: MIDERA
Shot using Canon 60D with Rokinon 8mm fisheye lens"
via Michael Dennis Raleigh on The MATRIXSYNTH Lounge
Roland MC-303s on eBay
KORG Prophecy Solo Synthesizer VHS Tape Featuring Jan Hammer & Joe Zawinul
via KORG on Facebook
"Here's the #vhs source for that awesome #Korg Prophecy video (feat. #joezawinul and #janhammer) that we uploaded to our YouTube channel! #tbt
Follow us on Instagram @korgofficial!
Watch the video at http://youtu.be/XZsJrAJXuWw."
From the Vault: Korg Prophecy Product Overview
Uploaded on Feb 3, 2012 Korg Official·395 videos
Prophetic Steps come in at :21. I could never duplicate it on the Z1 for a poly version.
"Straight from the Korg USA archives, here is a product overview of the revolutionary Korg Prophecy, with demos from world renowned keyboardists, Jan Hammer and Joe Zawinul. This video was originally produced in 1995."
Previously posted here.
Sequential Circuits Tattoo & DSI Prophet 12
via Dave Smith Instruments on Facebook
"It's Monday, move your week along with a nod to Sequential Circuits and the Prophet 12 by Jonas Sjostrom. Now that's dedication to your craft!"
Modcan: Quad LFO in Eurorack
via Control Synthesizers and Electronic Devices on Facebook
"Another New one from Bruce Duncan's Modcan: Quad LFO. Brilliantly executed and completely capable multiple LFO module.
Now In Stock: http://www.ctrl-mod.com/Modcan-Quad-LFO-p/modcan-quad-lfo.htm"
"The Quad LFO is a versatile and powerful source of modulation wavesforms that will extend the modular LFO well beyond simple vibrato. The Quad LFO has 16 wave types to choose from including various random waves and morphing wave sets which are actually 32 waves with smooth morph transition with the potential for thousands of different shapes. Each of the regular waves employs some form of real-time waveform transformation. For example the Sine wave can smoothly transform into a triangle wave, The stair case wave can change the number of steps on the fly, the Random wave has built in slew for smoothing, The pulse wave has variable width (PWM) etc. Please take a look at the animated gifs to see all the possible wave transforms possible..."
Korg Volca Keys Freakout
"This little freakout on the Korg Volca Keys was mainly played using the poly ring mode."
via Audio Cookbook
KORG Volcas on eBay
1960s FENDER RHODES PIANO BASS SN B0012
Note: Auction links are affiliate links for which the site may be compensated.
via this auction - learn how to sell on eBay here
Pics of the inside and an advertisement with the Piano Bass on a stand below.
"For sale is this vintage 1963 Fender Rhodes Piano Bass electronic keyboard. This particular pre-CBS example, serial number B-0012, is in very excellent 100% all original condition, and features the incredibly attractive combination of both rough Brown Tolex and and a taupe-colored Desert Sand finish ream fiberglass top. A Rhodes Bass similar to this variant was actually simultaneously displayed with a Blonde Tolex/Fiesta Red top version in the 1963 Fender catalog, which suggests the two different aesthetically appointed versions coexisted for a brief period. Shortly thereafter, sometime during 1965, the Rhodes Piano Bass evolved into the eqaully rare Brown Tolex/Gold Sparkle Top, and shortly thereafter the more common Black tolex/Silver Sparkle top variety most famously used by Ray Manzerik of the Doors. From my collection to yours, I have decided to sell this extremely fine example of a rare Rhodes Bass with No Reserve and FREE Worldwide shipping, so take advantage of this offer, because beautiful 100% original examples rarely come along!
This example is extremely well-preserved, exhibiting only slight storage wear on the original Brown Tolex. The original "Dog Bone" hard plastic handle is perfectly intact, and the original skirted Fender amp knobs are as well. They keys are pristine with expected weather checking, and the lighter-colored Walnut trim is in beautiful shape. The original Raymac tone bars are level and void of oxidation, while the rest of the internal components are highly preserved.
This keyboard works perfectly, and is surprisingly in tune. It is not believed to have been serviced nor repaired at any point since purchased new, so this is a genuinely intact all original unmolested example."
via this auction - learn how to sell on eBay here
Pics of the inside and an advertisement with the Piano Bass on a stand below.
"For sale is this vintage 1963 Fender Rhodes Piano Bass electronic keyboard. This particular pre-CBS example, serial number B-0012, is in very excellent 100% all original condition, and features the incredibly attractive combination of both rough Brown Tolex and and a taupe-colored Desert Sand finish ream fiberglass top. A Rhodes Bass similar to this variant was actually simultaneously displayed with a Blonde Tolex/Fiesta Red top version in the 1963 Fender catalog, which suggests the two different aesthetically appointed versions coexisted for a brief period. Shortly thereafter, sometime during 1965, the Rhodes Piano Bass evolved into the eqaully rare Brown Tolex/Gold Sparkle Top, and shortly thereafter the more common Black tolex/Silver Sparkle top variety most famously used by Ray Manzerik of the Doors. From my collection to yours, I have decided to sell this extremely fine example of a rare Rhodes Bass with No Reserve and FREE Worldwide shipping, so take advantage of this offer, because beautiful 100% original examples rarely come along!
This example is extremely well-preserved, exhibiting only slight storage wear on the original Brown Tolex. The original "Dog Bone" hard plastic handle is perfectly intact, and the original skirted Fender amp knobs are as well. They keys are pristine with expected weather checking, and the lighter-colored Walnut trim is in beautiful shape. The original Raymac tone bars are level and void of oxidation, while the rest of the internal components are highly preserved.
This keyboard works perfectly, and is surprisingly in tune. It is not believed to have been serviced nor repaired at any point since purchased new, so this is a genuinely intact all original unmolested example."
Yamaha VL1 Version 2 Acoustic Modelling Synthesizer
Note: Auction links are affiliate links for which the site may be compensated.
via this auction - learn how to sell on eBay here
I think this is the first time I noticed the VL1 has a floppy drive built into it. See the pic below.
via the seller: "If you are looking at this auction then you probably have some idea what a great instrument the VL-1 is for synthesizing new sounds and recreating acoustic instruments you can actually 'play'. The way the programs interact with the performance controls are genius to me. In my opinion the VL1 is one of Yamaha's greatest creations. It was crazy expensive in 1996 and was a big decision to purchase one. I fell in love with it as soon as I heard it. The programming possibilities are endless. All of the hardware must be top notch because it sounds and feels fantastic. Kind of in the same way my DX1 sounded and played better than my DX5. The quality components have to make a big difference..."
via this auction - learn how to sell on eBay here
I think this is the first time I noticed the VL1 has a floppy drive built into it. See the pic below.
via the seller: "If you are looking at this auction then you probably have some idea what a great instrument the VL-1 is for synthesizing new sounds and recreating acoustic instruments you can actually 'play'. The way the programs interact with the performance controls are genius to me. In my opinion the VL1 is one of Yamaha's greatest creations. It was crazy expensive in 1996 and was a big decision to purchase one. I fell in love with it as soon as I heard it. The programming possibilities are endless. All of the hardware must be top notch because it sounds and feels fantastic. Kind of in the same way my DX1 sounded and played better than my DX5. The quality components have to make a big difference..."
STG Soundlabs Post-Lawsuit Lowpass Filter for Synthesizers.com or Moog
Note: Auction links are affiliate links for which the site may be compensated.
via this auction - learn how to sell on eBay here
See the seller's other items for more.
"This module is listed by the manufacturer.
This filter is not a clone of the ARP 4072 submodule. It does, however, have an identical topology with the same transistors and operational amplifier array. Some people may find this is close enough to use the "C" word but not here at STG Soundlabs, so in tribute to the origin of this filter design it is called the Post-Lawsuit Lowpass Filter.
And before you call to complain, let me point out that Post-Ambiguous-Legal-Action Lowpass Filter just didn't have the same ring."
via this auction - learn how to sell on eBay here
See the seller's other items for more.
"This module is listed by the manufacturer.
This filter is not a clone of the ARP 4072 submodule. It does, however, have an identical topology with the same transistors and operational amplifier array. Some people may find this is close enough to use the "C" word but not here at STG Soundlabs, so in tribute to the origin of this filter design it is called the Post-Lawsuit Lowpass Filter.
And before you call to complain, let me point out that Post-Ambiguous-Legal-Action Lowpass Filter just didn't have the same ring."
STG Soundlabs triple VCA for Synthesizers.com or Moog Modular
Note: Auction links are affiliate links for which the site may be compensated.
via this auction. See the seller's other items for more.
Video at the auction and previously posted here.
"This module is listed by the manufacturer, and is called "Digital Attenuators" on the front panel because even though it functions as a VCA I would like you to consider that it can only attenuate, it cannot amplify ... and there is a digital control aspect.
The Digital Attenuators module is 3 digitally-controlled analogue attenuators (use them as VCAs) with a multipurpose sidechain input and switchable AC/DC coupling in 1MU. Each cell is built around a microcontroller and a digital potentiometer (an IC which functions as a digitally-controlled resistor pair, essentially), because only the digital potentiometer and unity i/o buffers are in the signal chain this is an extremely clean VCA.
A benefit of this arrangement is being able to read the audio input into the microprocessor and only update the digital potentiometer at the zero crossings of the input signal. no more irritating clicks on sine wave bass! in addition, the sidechain input can be used to send a different signal for reference to the zero crossing detector, which can also be switched to look for triggers or switched off completely so the digital potentiometer is updated constantly."
Video at the auction and previously posted here.
"This module is listed by the manufacturer, and is called "Digital Attenuators" on the front panel because even though it functions as a VCA I would like you to consider that it can only attenuate, it cannot amplify ... and there is a digital control aspect.
The Digital Attenuators module is 3 digitally-controlled analogue attenuators (use them as VCAs) with a multipurpose sidechain input and switchable AC/DC coupling in 1MU. Each cell is built around a microcontroller and a digital potentiometer (an IC which functions as a digitally-controlled resistor pair, essentially), because only the digital potentiometer and unity i/o buffers are in the signal chain this is an extremely clean VCA.
A benefit of this arrangement is being able to read the audio input into the microprocessor and only update the digital potentiometer at the zero crossings of the input signal. no more irritating clicks on sine wave bass! in addition, the sidechain input can be used to send a different signal for reference to the zero crossing detector, which can also be switched to look for triggers or switched off completely so the digital potentiometer is updated constantly."
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MATRIXSYNTH - EVERYTHING SYNTH
© Matrixsynth - All posts are presented here for informative, historical and educative purposes as applicable within fair use.
MATRIXSYNTH is supported by affiliate links that use cookies to track clickthroughs and sales. See the privacy policy for details.
MATRIXSYNTH - EVERYTHING SYNTH
