# Add Noise Drum module **URL:** \ **Category:** KOSMO MODULES\ **Created:** [January 2, 2024, 3:25pm UTC](https://lookmumnocomputer.discourse.group/t/add-noise-drum-module/6852 "2024-01-02T15:25:17Z")\ **Posts on this page:** 10\ **Page:** 1
**Author:** ![analogoutput](https://yyz2.discourse-cdn.com/free1/user_avatar/lookmumnocomputer.discourse.group/analogoutput/32/29663_2.png) [@analogoutput](https://lookmumnocomputer.discourse.group/u/analogoutput)\ **Post date:** [January 2, 2024, 3:25pm UTC](https://lookmumnocomputer.discourse.group/t/add-noise-drum-module/6852/1 "2024-01-02T15:25:17Z")
This is a drum module intended for analog percussive sounds with tone and/or noise components: Kick drums, toms, wood blocks, hi-hats, snares. It has nine knob-controlled parameters to vary the sound along with two attenuated CV inputs. There are `SEND` and `RECEIVE` jacks for replacing or effecting the internal tone and noise sources, and a sensitivity control for the trigger input. The circuit consists of five sections: Power, Trigger Handling, Tone, Noise, and Mixer. Tone consists of two decay envelope generators, a VCO, and a VCA; Noise comprises a noise source, two more decay envelope generators, a 6 db/octave VCF, and another VCA. Trigger Handling just conditions the input trigger. The Tone section creates a tone pulse with decreasing pitch and decaying amplitude. The Noise section creates a filtered white noise pulse with decreasing cutoff frequency and decaying amplitude. The tone and noise pulses are mixed to make the final output. Power, Trigger Handling, and Tone are based on the [Barton Analog Drum](https://bartonmusicalcircuits.com/drum/), with several modifications including the trigger sensitivity control, the `SEND` and `RECEIVE` jacks, and a number of component value changes. To that is added the Noise section (hence “Add Noise Drum”) whose noise source is taken from the [MFOS Noise Cornucopia](https://musicfromouterspace.com/analogsynth_new/NOISECORNREV01/NOISECORNREV01.php) with added filtering to eliminate crosstalk. The VCF core comes from the LM13700 datasheet, with component changes. The design has four PCBs: Two panel components boards and two main boards. The two panel components PCBs are identical, though assembled slightly differently. All four boards with a 100 mm panel constitute the Add Noise Drum. Just the Tone main board, one panel components board, and a 50 mm panel can be built as a Kosmo format Barton Analog Drum with the modifications mentioned above. The Tone `SEND` jack then becomes the module `OUT` jack, connected to the VCA output. Both Add Noise Drum and modified Analog Drum have been built and tested. No problems found other than a few minor silkscreen deficiencies (noted in the build notes); these have been corrected in the design and Gerber files. ![PXL_20240105_220436982](https://global.discourse-cdn.com/free1/uploads/lookmumnocomputer/original/3X/6/a/6a9f51aedd5e560169c3aaf2ac60be73bba99ff9.jpeg) Git repository [https://gitlab.com/rsholmes/and](https://gitlab.com/rsholmes/and) A few boards and panels will go up on my Tindie store in a week or so. ---
**Author:** ![devicex](https://yyz2.discourse-cdn.com/free1/user_avatar/lookmumnocomputer.discourse.group/devicex/32/28_2.png) [@devicex](https://lookmumnocomputer.discourse.group/u/devicex)\ **Post date:** [January 4, 2024, 12:53am UTC](https://lookmumnocomputer.discourse.group/t/add-noise-drum-module/6852/2 "2024-01-04T00:53:33Z")
this is awesome the Barton drums are some of my favorites your tweaks should make them even better ! ---
**Author:** ![Kelaifu](https://avatars.discourse-cdn.com/v4/letter/k/46a35a/32.png) [@Kelaifu](https://lookmumnocomputer.discourse.group/u/Kelaifu)\ **Post date:** [January 6, 2024, 4:01am UTC](https://lookmumnocomputer.discourse.group/t/add-noise-drum-module/6852/3 "2024-01-06T04:01:13Z")
these look great, can we expect a demo video? Always enjoy an episode of AOTV. ---
**Author:** ![analogoutput](https://yyz2.discourse-cdn.com/free1/user_avatar/lookmumnocomputer.discourse.group/analogoutput/32/29663_2.png) [@analogoutput](https://lookmumnocomputer.discourse.group/u/analogoutput)\ **Post date:** [January 6, 2024, 4:05am UTC](https://lookmumnocomputer.discourse.group/t/add-noise-drum-module/6852/4 "2024-01-06T04:05:50Z")
I… think so? It’s been a LONG time since I’ve done any videos, but I really should… ---
**Author:** ![BenRufenacht](https://avatars.discourse-cdn.com/v4/letter/b/ba8739/32.png) [@BenRufenacht](https://lookmumnocomputer.discourse.group/u/BenRufenacht)\ **Post date:** [January 6, 2024, 4:33am UTC](https://lookmumnocomputer.discourse.group/t/add-noise-drum-module/6852/5 "2024-01-06T04:33:22Z")
I will probably build one without hearing a demo, but I still want to hear a demo… ---
**Author:** ![danbass](https://avatars.discourse-cdn.com/v4/letter/d/9e8a1a/32.png) [@danbass](https://lookmumnocomputer.discourse.group/u/danbass)\ **Post date:** [January 6, 2024, 6:12am UTC](https://lookmumnocomputer.discourse.group/t/add-noise-drum-module/6852/6 "2024-01-06T06:12:17Z")
I’ll echo everyone here, would love to see/hear a demo and see another YouTube video. I’ve got an analog, FM drum, and a decaying noise all nearing the point of getting faceplates. Would love to see how you’ve taken them to the next level. ---
**Author:** ![SYNTHGUY57](https://yyz2.discourse-cdn.com/free1/user_avatar/lookmumnocomputer.discourse.group/synthguy57/32/14422_2.png) [@SYNTHGUY57](https://lookmumnocomputer.discourse.group/u/SYNTHGUY57)\ **Post date:** [January 6, 2024, 10:29pm UTC](https://lookmumnocomputer.discourse.group/t/add-noise-drum-module/6852/7 "2024-01-06T22:29:16Z")
I would like very much to buy that way please. ---
**Author:** ![KardashevTypeII](https://avatars.discourse-cdn.com/v4/letter/k/43a26b/32.png) [@KardashevTypeII](https://lookmumnocomputer.discourse.group/u/KardashevTypeII)\ **Post date:** [January 8, 2024, 3:25am UTC](https://lookmumnocomputer.discourse.group/t/add-noise-drum-module/6852/8 "2024-01-08T03:25:11Z")
I’m interested in an AND module board and panel. -Fumu / Esopus ---
**Author:** ![analogoutput](https://yyz2.discourse-cdn.com/free1/user_avatar/lookmumnocomputer.discourse.group/analogoutput/32/29663_2.png) [@analogoutput](https://lookmumnocomputer.discourse.group/u/analogoutput)\ **Post date:** [January 13, 2024, 4:12pm UTC](https://lookmumnocomputer.discourse.group/t/add-noise-drum-module/6852/9 "2024-01-13T16:12:31Z")
Demo up here: > **[Add Noise Drum — demo](https://diode.zone/w/bLZP93vPBo9ntMW1XdzJeM)** > > Demo of Add Noise Drum (Kosmo synth module) _Added:_ Full video > **[Add Noise Drum](https://diode.zone/w/5uob3TnU9R7dDQK4VKM25v)** > > A look at the Add Noise Drum, a Kosmo format analog drum module for tone and noise based drum sounds. Git repository: https://gitlab.com/rsholmes/and Blog post: https://www.richholmes.xyz/analogout... ---
**Author:** ![danbass](https://avatars.discourse-cdn.com/v4/letter/d/9e8a1a/32.png) [@danbass](https://lookmumnocomputer.discourse.group/u/danbass)\ **Post date:** [January 16, 2024, 2:40am UTC](https://lookmumnocomputer.discourse.group/t/add-noise-drum-module/6852/10 "2024-01-16T02:40:23Z")
Great video as always @analogoutput, and really looking forward to this one. Hoping to have my JLCPCB order received over the next few days and this’ll go right to the top of the queue.