Thanks Andy! Your order will be shipping today.
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Thanks Script!
I have assembly instructions and a Mouser Project Manager BOM available: Waveulator ME Saturator Construction Information - Pro Audio Design Forum
In a couple of days I'll add final test info.
I have assembly instructions and a Mouser Project Manager BOM available: Waveulator ME Saturator Construction Information - Pro Audio Design Forum
In a couple of days I'll add final test info.
Slime_Lord
Well-known member
Grabbed 2 yesterday!
I still need to read through all of the documentation but should the 10K controls (makeup, threshold, ratio) have a linear or logarithmic taper?
Thanks for this great project, Wayne!
-Alex
I still need to read through all of the documentation but should the 10K controls (makeup, threshold, ratio) have a linear or logarithmic taper?
Thanks for this great project, Wayne!
-Alex
Thanks Alex!
The make-up control is definitely linear taper and is calibrated in dB/volt. I use 10KΩ.
I've been using 10KΩ linear taper for the threshold but if it were a stepped switch I'd make it log taper calibrated in -dBFS with "0" being fully clockwise. I need to experiment using a log taper pot which should have a better feel. There's a trim pot on board so the user can set 0 dBFS to whatever the 0 dBFS of the converter is.
For ratio/hardness I've been using a dual linear 10KΩ. For lower-level inputs most of the action is in the upper rotation but for hot inputs the better working region is in the lower half. There's really no definable scale since the combination of linear detection and exponential makes the having a conventional ratio scale ranging from 1:1 to 1:X difficult. A scale ranging from 0-10 using a pot or, for a 12 or 24 step switch, 0-11 seems to make the most sense.
Adjustment of ratio is best metered with the on-board voltage or current gain reduction outputs. A meter plug-in on the A/D provides the full picture: I've been using the K-Meter.
One thing worth pointing out is that the gain reduction circuit meters peak reduction. A 6 dB peak GR indication metered with an RMS or average-responding meter on a sine wave will show less GR since as the signal gets squashed it gets fatter as harmonics are added in. The RMS level decreases at a lower rate than the peak.
The make-up control is definitely linear taper and is calibrated in dB/volt. I use 10KΩ.
I've been using 10KΩ linear taper for the threshold but if it were a stepped switch I'd make it log taper calibrated in -dBFS with "0" being fully clockwise. I need to experiment using a log taper pot which should have a better feel. There's a trim pot on board so the user can set 0 dBFS to whatever the 0 dBFS of the converter is.
For ratio/hardness I've been using a dual linear 10KΩ. For lower-level inputs most of the action is in the upper rotation but for hot inputs the better working region is in the lower half. There's really no definable scale since the combination of linear detection and exponential makes the having a conventional ratio scale ranging from 1:1 to 1:X difficult. A scale ranging from 0-10 using a pot or, for a 12 or 24 step switch, 0-11 seems to make the most sense.
Adjustment of ratio is best metered with the on-board voltage or current gain reduction outputs. A meter plug-in on the A/D provides the full picture: I've been using the K-Meter.
One thing worth pointing out is that the gain reduction circuit meters peak reduction. A 6 dB peak GR indication metered with an RMS or average-responding meter on a sine wave will show less GR since as the signal gets squashed it gets fatter as harmonics are added in. The RMS level decreases at a lower rate than the peak.
I wanted to write and thank everyone for their support of the Waveulator and other widgets.
Some of you have already received your Waveulator boards and the rest are on their way. I've had to build some boards the last couple of days and can now return to documenting Waveulator final checkout and test instructions. Thanks again everyone!
Some of you have already received your Waveulator boards and the rest are on their way. I've had to build some boards the last couple of days and can now return to documenting Waveulator final checkout and test instructions. Thanks again everyone!
Slime_Lord
Well-known member
Thanks for the detailed response on the pot tapers. For the ratio pot, I was planning on building the controls stepped but I’ll experiment around with 10K pots with different tapers before populating the switches.
Trying to finalize the panel design before proceeding, it’s almost there! Bought a hole saw kit for the mA meter, fingers crossed my drill press doesn’t lock up while using it.
Trying to finalize the panel design before proceeding, it’s almost there! Bought a hole saw kit for the mA meter, fingers crossed my drill press doesn’t lock up while using it.
For those with Waveulator boards I've updated the assembly instructions to include final test.
https://www.proaudiodesignforum.com/forum/php/viewtopic.php?t=1331
https://www.proaudiodesignforum.com/forum/php/viewtopic.php?t=1331
I just received a run of 20 segment LED gain reduction boards similar to the original Pico GR-20 and have pics of the prototype.
I added some additional powering options and the ability to switch it to dot mode. It uses the LM3914 which are still widely available on Amazon, eBay and are also now made by HLF.
My motivation was to provide an LED GR meter for the Waveulator but this meter, with its 2.4V FS input, is suitable for other linear dB applications including the original Pico and dBx clones.
GR20 Gain Reduction Meter, Actual Height 1.0" Width 3.1"
Now available in the KA Store: Gain Reduction Meter - 20 Segment Bar Graph - Linear 2.4V Full Scale
Schematics are here: Gain Reduction Meter - 20 Segment Bargraph - Pro Audio Design Forum
More stuff at KA Electronics/Rockmore-Labs
I added some additional powering options and the ability to switch it to dot mode. It uses the LM3914 which are still widely available on Amazon, eBay and are also now made by HLF.
My motivation was to provide an LED GR meter for the Waveulator but this meter, with its 2.4V FS input, is suitable for other linear dB applications including the original Pico and dBx clones.
GR20 Gain Reduction Meter, Actual Height 1.0" Width 3.1"
Now available in the KA Store: Gain Reduction Meter - 20 Segment Bar Graph - Linear 2.4V Full Scale
Schematics are here: Gain Reduction Meter - 20 Segment Bargraph - Pro Audio Design Forum
More stuff at KA Electronics/Rockmore-Labs
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@tommia Thank you for inquiring.
International shipping via First Class to most international destinations is around $18.50 US for the first 8 ounces.
Most single boards, or 8 GR meter boards - with packaging - can be shipped under 8 ounces.
I will have a greater quantity of GR meters available for shipment in a few days. Some of the first run of 10 are already sold. I'll post here when they come in.
On another topic I'm getting in some LM3914N from Amazon in a couple of days from two different vendors. One has TI markings the other apparently Chinese but not HLF. Curious as to how these will work out. I think some vendors are buying TI die and packaging them. My suspicion is the reason TI discontinued the LM391XN and not the "V" version is that they were done buying and using 18 pin DIP lead frames. Just a guess though.
There is an HLF vendor who has LM3914, LM3915 and LM3916 in the UK on eBay. I exchanged email with Raimonds, the shop owner, and turns out he is an authorized HLF distributor and synth builder. His eBay store listing for the LM3914 is: 10pcs Deal LM3914 Dot Bar Display Driver HLF Original IC Chips Sale Uk Stock | eBay His shop is: svinavate For whatever reason only two of his items appear on the US site; the UK site has his full store. HLF appear to be manufacturing these as they offer the LM3915 and LM3916 which TI no longer produces.
International shipping via First Class to most international destinations is around $18.50 US for the first 8 ounces.
Most single boards, or 8 GR meter boards - with packaging - can be shipped under 8 ounces.
I will have a greater quantity of GR meters available for shipment in a few days. Some of the first run of 10 are already sold. I'll post here when they come in.
On another topic I'm getting in some LM3914N from Amazon in a couple of days from two different vendors. One has TI markings the other apparently Chinese but not HLF. Curious as to how these will work out. I think some vendors are buying TI die and packaging them. My suspicion is the reason TI discontinued the LM391XN and not the "V" version is that they were done buying and using 18 pin DIP lead frames. Just a guess though.
There is an HLF vendor who has LM3914, LM3915 and LM3916 in the UK on eBay. I exchanged email with Raimonds, the shop owner, and turns out he is an authorized HLF distributor and synth builder. His eBay store listing for the LM3914 is: 10pcs Deal LM3914 Dot Bar Display Driver HLF Original IC Chips Sale Uk Stock | eBay His shop is: svinavate For whatever reason only two of his items appear on the US site; the UK site has his full store. HLF appear to be manufacturing these as they offer the LM3915 and LM3916 which TI no longer produces.
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That's a thought and I appreciate the offer. I did something similar for Markus' insert switcher and eventually bought his Gerbers.
I’m sure a few of us on this side of the Atlantic would appreciate the offer too.
I'll give the previous suggestions some thought.
In the meantime I now have a product listing for the bare PC board and will be adding a "kit" with LM3914 and an assembled and tested unit.
https://ka-electronics.com/shop/index.php?route=product/product&path=63&product_id=186
In the meantime I now have a product listing for the bare PC board and will be adding a "kit" with LM3914 and an assembled and tested unit.
https://ka-electronics.com/shop/index.php?route=product/product&path=63&product_id=186
Before I ship it out I wanted to snap a couple of pics of a recent 10 Filter Input Gain Filter Output "IGFO" board stack I made for a client.
There are 4 HP filters on the top board for 20, 30, 40 and 50 Hz. There is no gain switching other than a +6dB mode.
The second board is a split HP/LP combination handling 60 Hz HP and 12 kHz LP.
The third board, on the bottom, handles the 14, 16, 18 and 22 kHz LP filters along with the final THAT1646 output.
The boards are sandwiched by threaded hex spacers. I used cut-off 4-40 screws to make 4-40 all-thread for the second and third boards.
Input Gain Filter Output IGFO board stack.
Input Gain Filter Output IGFO board stack.
The filter frequencies are under relay control and require only a one pole rotary switch for both channels' LP filter and a second rotary for the HP. Though it might seem easier to simply switch filter components, the IGFO board uses a bank of filters and inserts only the selected low and/or high pass filter into the signal path. For stereo, two 4 pole rotary switches would be required but when preview for vinyl cutting is added, which is often the case, the two required switches grow to 8 poles. The "bank of filters" approach reduces the rotary switch requirements to one pole. The wiring pigtails for the rotary switches will be terminated by the customer and can be seen hanging off to the side.
There are 4 HP filters on the top board for 20, 30, 40 and 50 Hz. There is no gain switching other than a +6dB mode.
The second board is a split HP/LP combination handling 60 Hz HP and 12 kHz LP.
The third board, on the bottom, handles the 14, 16, 18 and 22 kHz LP filters along with the final THAT1646 output.
The boards are sandwiched by threaded hex spacers. I used cut-off 4-40 screws to make 4-40 all-thread for the second and third boards.
Input Gain Filter Output IGFO board stack.
Input Gain Filter Output IGFO board stack.
The filter frequencies are under relay control and require only a one pole rotary switch for both channels' LP filter and a second rotary for the HP. Though it might seem easier to simply switch filter components, the IGFO board uses a bank of filters and inserts only the selected low and/or high pass filter into the signal path. For stereo, two 4 pole rotary switches would be required but when preview for vinyl cutting is added, which is often the case, the two required switches grow to 8 poles. The "bank of filters" approach reduces the rotary switch requirements to one pole. The wiring pigtails for the rotary switches will be terminated by the customer and can be seen hanging off to the side.
skal1
Well-known member
Hi Wayne have still got these..
I just found a source for a small quantity of NOS THAT4301P
I just found a source for a small quantity of NOS THAT4301P
I'm working on a stereo compressor to replace the 4301-based Pico Compressor.
My focus is on improving the Sidechain using what I call Quadrature Power Summation to provide a fast "Zero Ripple" True Power Sum detector.
You can follow the development progress of the "Uno Compressor" here: A Quadrature Power-Summed Compressor Sidechain For "The Uno Compressor" - Pro Audio Design Forum
My focus is on improving the Sidechain using what I call Quadrature Power Summation to provide a fast "Zero Ripple" True Power Sum detector.
You can follow the development progress of the "Uno Compressor" here: A Quadrature Power-Summed Compressor Sidechain For "The Uno Compressor" - Pro Audio Design Forum
