Squeeze 4HP compressor by FEEDBACK [NEW! SMD Project]

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strat-1
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Squeeze 4HP compressor by FEEDBACK [NEW! SMD Project]

Post by strat-1 » Sat Jun 06, 2020 6:29 am

www.feedbackmodules.com

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MAIN PCB Top and Bottom
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POWER PCB Top and Bottom
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Squeeze is a SMD project based on THAT4305 chip, which incorporates a high-performance Blackmer® voltage-controlled amplifier (VCA) and a log-responding RMS-level sensor.
The VCA and RMS detector are pre-trimmed to deliver low distortion without further adjustment, so no trimmers are required.
The circuit is designed for continuous adjustment of gain, threshold and compression ratio with a single potentiometer.
There is also a knob for input level and a knob for make-up gain.
We think this is an interesting and simple to use module, good to have on independent synth or sampler lines like kicks, snares, hats, bass lines etc.
The schematic is adapted from THAT design notes.
The project is a medium SMD build. The most complex part to solder is THAT chip with QSOP-28 footprint.

Squeeze is available in three type of kits :

KIT1 :
- 2 x PCBs + Front Panel

KIT2 :
- 2 x PCBs + Front Panel
- 1 x THAT4305 smd chip
- 1 x BC846 dual transistor
- 1 x BC856 dual transistor

KIT3 :
- 2 x PCBs + Front Panel
- 1 x THAT4305 smd chip
- 1 x BC846 dual transistor
- 1 x BC856 dual transistor
- 1 x 10KB Pot
- 1 x 100KB Pot
- 1 x 100KA Pot
- 2 x Minijack sockets
- 1 x 6way Pinheader Male for 10/12mm spacer
- 1 x 6way Pinheader Female for 10/12mm spacer
- 3 x 1900h Cream Knobs

We added the dual transistors in KIT2 and KIT3, the rest of the parts like resistors, caps, diodes, are easy to be found on every common store.
Even if you already have the dual transistors we thought it's good to have some spare ones in case the soldering goes wrong.

We just released 3 new projects : Squeeze, CP3- and Static SMD.
Stay tuned for new projects in 1-2 months :)

SOUND DEMOS :

Sampler through two Squeeze modules, one for kick and one for snare.
0:00 Uncompressed
0:08 Low compression on Kick
0:16 Medium compression on Kick
0:24 Kick uncompressed, Low compression on Snare
0:32 Medium compression on Snare
0:40 Hard compression on Snare
0:48 Mix through one Squeeze, Medium compression
0:56 Mix + HiHat, Medium compression



Two Peaks through two Squeeze modules, one for kick and one for snare.
0:00 Uncompressed
0:07 Low compression on Kick
0:14 Medium compression on Kick
0:21 Kick uncompressed, Low compression on Snare
0:27 Medium compression on Snare
0:34 Hard compression on Snare
0:41 Mix through one Squeeze, Low compression
0:48 Mix through one Squeeze, Medium compression



Xoxbox + Squeeze
0:00 Uncompressed
0:12 Low compression
0:23 Medium compression
0:37 Hard compression + rasing the resonance
1:08 Uncompressed Xox, You can hear the volume difference between compressed Xox and
uncompressed high resonance Xoxbox.


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Tonescape
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Re: Squeeze 4HP compressor by FEEDBACK [NEW! SMD Project]

Post by Tonescape » Sun Jun 07, 2020 3:13 am

I like the way you implemented the power socket on a separate PCB in a way that the main PCB is protected. I might steal that idea for future projects, ha ha.

And, like I wrote in another thread - I think you totally nailed it with size and price!

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strat-1
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Re: Squeeze 4HP compressor by FEEDBACK [NEW! SMD Project]

Post by strat-1 » Sun Jun 07, 2020 1:21 pm

Tonescape wrote:
Sun Jun 07, 2020 3:13 am
I like the way you implemented the power socket on a separate PCB in a way that the main PCB is protected. I might steal that idea for future projects, ha ha.

And, like I wrote in another thread - I think you totally nailed it with size and price!
Thx man. For all the SMD projects I released now and for the ones I have in work I used the same idea, to protect the SMD parts.
I do not want for modules to come back with electrolytic capacitors broken. :)

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thetwlo
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Re: Squeeze 4HP compressor by FEEDBACK [NEW! SMD Project]

Post by thetwlo » Tue Jul 28, 2020 8:25 pm

this looks great! Just wish it was 805! Haven't had much luck with 603(resistors and caps are fine)

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cackland
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Re: Squeeze 4HP compressor by FEEDBACK [NEW! SMD Project]

Post by cackland » Tue Jul 28, 2020 9:56 pm

thetwlo wrote:
Tue Jul 28, 2020 8:25 pm
this looks great! Just wish it was 805! Haven't had much luck with 603(resistors and caps are fine)
Looking at the build files, the passive components have plenty of space around them and from my experience, you can still solder 0805 on 0603 pads. It may overshoot every so slightly.

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thetwlo
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Re: Squeeze 4HP compressor by FEEDBACK [NEW! SMD Project]

Post by thetwlo » Wed Jul 29, 2020 12:17 am

cackland wrote:
Tue Jul 28, 2020 9:56 pm
thetwlo wrote:
Tue Jul 28, 2020 8:25 pm
this looks great! Just wish it was 805! Haven't had much luck with 603(resistors and caps are fine)
Looking at the build files, the passive components have plenty of space around them and from my experience, you can still solder 0805 on 0603 pads. It may overshoot every so slightly.
thanks! may try! 603 caps and resistors are ok. it's the IC's.

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Re: Squeeze 4HP compressor by FEEDBACK [NEW! SMD Project]

Post by cackland » Wed Jul 29, 2020 12:25 am

thetwlo wrote:
Wed Jul 29, 2020 12:17 am

... it's the IC's.
Yeah, tssop packages are nice and tiny. The ole' flux and solder drag should work nicely if hand soldering.

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