Roland Bass Line TB-303 w/ Original Box & Troubleshooting Card

Note: Auction links are affiliate links for which the site may be compensated.

via this eBay listing

"It comes with the original box, styrofoam, and troubleshooting paper. The box has wear and one flap side has come off. The unit has wear use, so please see all of the photos for exterior condition."

CLICK FOR MORE »

Alchemical by MSTRBLSTR

Also on Spotify: https://open.spotify.com/album/68lqZLDB2ip4ZOfEg4SsmB?si=m3ba1VD-SSO_CLr4j7OIMg

"The electricity of live manipulation breathes through every sequence as MSTRBLSTR transmutes the raw essence of the TR-606, MC-202, and TB-303 into a sonic incantation. Alchemical is transformation in motion: analog breakbeats pulse with crackling percussion, acid squelches growl and evolve, and rhythms dissolve and reassemble like matter through fire. The bassline becomes the bedrock of energy, conjured live in real time.

Credits
Released May 29, 2025
Programmed, performed, mixed, and mastered by MSTRBLSTR at Ill Acid
Additional drum programming: Severed Machines (https://severedmachines.com)

Hardware:

Modified Roland TR-606 (Robin Whittle mods)

Din Sync RE-303

MC-202 w/ Tubbutec 2oh2 mod

Mixers: Boss BX-8, Alice 1228, Boss KM-4

FX: Tapco 4400 spring reverb, TC Nova Reverb & Delay, Korg SDD-1000/1200

Compression: BSS DPR-402, DOD SR-866

DAW: Ableton Live

This is the same setup I used on From Deep.

Backstory
I brought my TR-606 to Ramiro at Severed Machines to install a few long-desired mods: switch replacements, a louder BD via resistor change, and Robin Whittle’s Accent Trigger and post-volume individual outs. He left in a few patterns, including a breakbeat variation that really hit me. That inspired the synth parts. Next thing I knew, I was performing and recording the full track.

Recording Notes
I treat mixers as modular routers. For Alchemical, the Alice mixer’s direct outs went straight into my interface, while the Boss BX-8 worked as a submixer for overdrive and tone shaping. I panned certain tracks hard L/R into separate buses, then re-centered them on different mixer channels. I have owned many delays while the Korg units are among my favorites, the TC Nova is often a go-to for synths: it sounds great, has nice filters, tap tempo, and my favorite feature, easily accessible time divisions Protip: a buffered pedal in front helps them sound better. The Nova reverb is also very playable and has a dynamic ducking mode that helps it get out of the way, if that's what I need.

In post, I swapped the TR-606 kick for a TR-808 sample in Ableton - it just gave the track the weight it needed. There’s also a lone TR-808 clap halfway through. Other than that, what you hear is live with only some minor edits and additional processing.

__________________________________________________________________

For TR-606 lovers: I highly recommend Robin Whittle’s mods: https://www.firstpr.com.au/rwi/tr-606/

The Accent Trigger mod alone is worth it - it adds great performance potential. Robin credited the fix to me, but Ramiro deserves most of the credit. Robin's individual outs (post-volume pot) offer superior performance control and gain staging flexibility compared to the more common pre-pot version."

Roland EF-303 Groove Effects Groovebox SN ZN92462

Note: Auction links are affiliate links for which the site may be compensated.

via this Reverb listing

""Dj-oriented machine with step value modulations inspired from analog sequencer.

The EF303 also includes a V.A digital drum machine and a TB -303 emulation"

CLICK FOR MORE »

Acidcode BassLine ML-303 SN V652

Note: Auction links are affiliate links for which the site may be compensated.

via this listing This one is in via Chris. You can find some DIY builds and demos in previous posts here. These aren't too common. The last post was from 2018 and the first from 2006.

Details from the listing:

"Acidcode BassLine ML-303 analog synthesizer in perfect condition.

One of the best Roland TB-303 replicas in version 6. A classic among step sequencers and rarely available these days. All knobs, buttons, and switches work. Of course, you shouldn't turn it too far beyond its limit to avoid damaging it.

Only the delay knob is comparatively easier to turn, and the knob spins slightly. The delay knob itself works, though, so it doesn't matter if the knob continues to rotate at its limit. I might be able to find a replacement knob.

Firmware version: V7.02 July 08

Included in the offer are:
-Power supply
-1x MIDI red
-1x MIDI yellow
-Stereo 6.3mm jack to mono
-Mono 6.3mm jack
-Manual (printed version only)

Recommend this online Manual:

https://www.sequencer.de/files/ml303guide_user.pdf

For more information:

https://de.wikipedia.org/wiki/Roland_TB-303

https://www.sequencer.de/syns/roland/TB303.html
http://www.acidcode.de/"

CLICK FOR MORE »

Roland SH-101 editor for the Tubbutec SH-1oh1 Modification

video upload by MrSynthmania

"Unlock the full power of your Roland SH-101 with the Tubbutec SH-1oh1 mod! In this video, we dive into the awesome Synthmania editor, showing you how to sync LFOs to MIDI clock, tweak the extra filter LFO, and take your sound to the next level. Grab it now at synthmania.de and start creating epic synth vibes!"

https://synthmania.de/2025/04/roland-...

"Standalone • VST3 • AU – for Windows & macOS

We’re excited to present our brand-new software editor for the Tubbutec SH-1oh1 Mod – the ultimate control center for all advanced features of the legendary Roland SH-101. With this editor, you’ll unlock the full creative potential of your synthesizer, right from your screen.

Why this editor?

The Tubbutec mod transforms the Roland SH-101 into a powerhouse – but many of its features are only accessible via key combinations or hidden parameters. This editor solves that: All settings at a glance, easy access, and perfect DAW integration."

CLICK FOR MORE »

Michigan Synth Works & Neutron Sound Presents Caveman Modules: Low Cost High Quality Euro

Caveman Modules is a collaboration between Michigan Synth Works and Neutron sound focusing on affordable, quality modules with unique features and functionality. Caveman Modules are designed to be simple to use and are perfect for musicians just breaking into the eurorack world while still offering higher level functionality for more advanced users.

Check with dealers on the right for upcoming availability.

The Launch Line-Up:

30SC: A voltage-controlled oscillator inspired by the legendary Roland TB-303 with square, tri, and 2 saw outputs. 3OSC also features an innovative hard sync input for chaining multiple units and an FM modulation attenuverter.

Specifications
• Width: 6HP
• Depth: 25 mm
• Current Draw: +12 V: 6mA, -12 V: 6mA
• Price: US$100

CLICK FOR MORE »

Future Retro revolution. (Tb-303 clone).

video upload by David Noise

"The famous TB-303..

CLICK FOR MORE »

ACID SYNTH - Our Homage To A Classic That Launched A Genre

video upload by The Crow Hill Company

Press release follows:

The Crow Hill Company creates VAULTS - ACID SYNTH as an homage to the revered Roland TB-303 Bass Line synth and associated Acid House genre

EDINBURGH, UK: music-making community tools-maker The Crow Hill Company is proud to announce availability of VAULTS - ACID SYNTH as the latest entry into its lengthening line of free and accessible virtual instruments arising from company co-founder and composer Christian Henson effectively opening his ‘vaults’ for everyone to enjoy — this time creating an homage to the revered Roland TB-303 Bass Line, launched with high hopes in 1981 as a so-called Computer Controlled bass synth by the Japanese giant of electronic musical instrument manufacturing responsible for its creation before being deemed a commercial failure and discontinued quite quickly thereafter, though it was later instrumental in driving Acid House into the musical mainstream as a whole new EDM (Electronic Dance Music) genre and associated cultural movement, the popularity of which triggered a dramatic rise in the price of used units — as of March 19…

It is fair to say that when Roland released its TB-303 Bass Line in 1981 as a so-called Computer Controlled bass synth with the intention of mimicking the characteristics of an electric bass guitar, there were far fewer tools to create electronic music available. But buyers of the TB-303 Bass Line were possibly swayed by the fact that it could be time-synced — using Roland’s proprietary five-pin DIN sync interface (later superseded by MIDI) — to its contemporarily-released Computer Controlled sibling, the TR-606 Drumatix drum machine, making for an affordable rhythm section that could conceivably fit into a small briefcase as a beautiful backing combination for the solo gigging musician, further helped by both devices being battery operated as an attractive alternative to their (included) AC adapters… or so Roland had hoped.

Though the engineers involved tried their best to imitate the sound of an electric bass guitar with the technology of the time, the TB-303 Bass Line fell short in capturing its subtleties as an instrument, sadly, so it was discontinued within a couple of years, with Roland cheaply selling off the last of the 10,000 units manufactured. Now, normally this would be the end of the story, yet something incredible happened…

Helpfully, for the benefit of anyone not already in the know, The Crow Hill Company’s Theo Le Derf picks up what is an incredible story in itself: “DJ Pierre and his band called Phuture found a used TB-303 in a music shop in Chicago for a bargain price. They started experimenting with the bass sequencer and a drum machine while playing about randomly with the filter and resonance knobs. The sound they produced was so unique and, frankly, weird that they decided to commit the jam session to tape. With the release of this experiment on Trax Records in 1987, they unwittingly birthed a new genre: Acid House. This slimy, hypnotic, subversive sound subsequently built a cultural movement, and was the soundtrack to many illegal warehouse parties of the late Eighties — all of this from a tiny synth that was used ‘incorrectly’.”

Thanks to VAULTS - ACID SYNTH’s GUI (Graphical User Interface) being as intuitive as always, correct — or ‘incorrect’ — usage of the virtual instrument in question comes quickly. “The first large dial — CUT OFF — is a 24dB lowpass filter that controls what high frequencies you cut out, and it is automatically assigned to MIDI CC1.” So starts Theo Le Derf by way of an appropriately quick guided tour, before continuing: “RESONANCE determines the peak of the filter as it opens and closes, which creates that characteristically ‘squelchy’ sound that the synth is known for. The small dials are more concentrated effects — MOD controls how much voltage is being sent to the filter, so you can get some really interesting sounds by adjusting the CUT OFF dial and MOD simultaneously; DECAY controls the decay for all the envelopes; and, of course, there is also our standard ECHO and SPLOSH, with the SPLOSH being an algorithmic imitation of a cave, which suits this synth so brilliantly.”

It is as easy as that, though Theo Le Derf is keen to add: “Another thing to mention is that you can obviously play staccato, but when you play legato — MIDI notes overlapping with one another, you get a glide between the notes. This glide effect is another characteristic that the ’303 is renowned for.”

No need, necessarily, then, to risk dropping a bank-balance-busting four-figure sum on a decades-old Roland TB-303 Bass Line when The Crow Hill Company’s ‘tribute’ truly captures the essence of its distinctive sound for all to enjoy for literally nothing. Notes Theo Le Derf, ending on a high note: “The story arc of this synth is so amazing — from its unpromising beginning to completely defining a genre and an era, it’s so
exciting to have this celebrated instrument at my fingertips for free!”

VAULTS - ACID SYNTH is free for everyone — as are all VAULTS… releases from The Crow Hill Company — from here: https://thecrowhillcompany.com/vaults/

Future Retro Revolution mk2

Note: Auction links are affiliate links for which the site may be compensated.
video upload by JG

via this listing

"Future Retro Revolution MK2 for sale on Reverb.

00:00 - Playing with patterns
01:03 - Switching Waveform|
01:30 - Daft Punk - Da Funk
01:43 - FX Controls
02:03 - Remix Controls
02:23 - Overdrive

The sound in this vid is recorded directly into 1010Music BlueBox, with no added mastering, compression, or limiting.

Kick drum plays to show the unit receiving MIDI clock and transport without hiccups."

via this listing

"Future Retro Revolution mk2: a rare and gnarly Roland TB-303 clone for that classic acid house sound. (demo video in image gallery).

Here's the good stuff:

Rare analog monosynth
Onboard digital effects processor
3-pole (18 dB/oct) filter like the original TB
Onboard overdrive
New onboard memory battery
Run external signals through the filter and gated sequencer
CV, Din Sync, MIDI IO
Easily programmable sequencer (unlike the original TB-303)
remix your patterns with 256 algorithmic variations (more than 65,000 combinations)
Note: screen IS NOT foggy. That's just my phone failing to expose correctly."

CLICK FOR MORE »

Another 303 day!

video upload by Jarkko Tuohimaa

"Roland TB-303 type bassline made with BassBot!"

HYP3 Core Engine 開発 - Roland TB-303との比較テストの記録

video upload by SYNTHERNET

Googlish translation below.

"これは2024年6月に行ったHYP3 Core Engine (仮称) というアナログモデリング音源とRoland TB-303との比較テストの記録です。 HYP3 Core Engine (仮称) はSYNTHERNETで開発中のハードウェアシンセサイザー、HYP3やG3N3などで使用するモデリング音源です。 動画で使用しているMICRO HYP3は、実験用のハードウェアです。オーバークロックされたSTM32F411 (Cortex-M4, 120MHz) で動作しています。

左上の表示はas_SonoGx2というスペクトログラフを使用しています。 横軸が時間で縦軸が周波数です。レゾナントピークが輝線として見えるため、カットオフ周波数のエンベロープ形状を観察することができます。オレンジ (HYP3) とブルー (TB-303) が重なると白く表示されます。

テスト1ではテンポ上昇とアクセントの連続に追従してエンベロープが上昇していく状態を比較しています。オシレーターがフリーランニングなので位相差のずれは起こりますが、エンベロープ自体はほとんど一致しています。

テスト2ではパラメータを変化させた時の変化を比較しています。HYP3 Core Engineはポテンショメータのカーブやパラメータ範囲までTB-303に一致させています。これは個体に合わせて調整することも可能です。

テスト3では同じ外部のディストーションをかけた時の比較です。歪ませたとしても、かなり近いフィーリングを得ることができます。"

Googlish:

This is a record of a comparison test conducted in June 2024 between the analog modeling sound source called HYP3 Core Engine (tentative name) and the Roland TB-303.

The HYP3 Core Engine (tentative name) is a modeling sound source used in hardware synthesizers under development at SYNTHERNET, such as HYP3 and G3N3.

The MICRO HYP3 used in the video is experimental hardware. It runs on an overclocked STM32F411 (Cortex-M4, 120MHz).

The display in the upper left uses a spectrograph called as_SonoGx2.

The horizontal axis is time and the vertical axis is frequency. The resonant peak appears as a bright line, so you can observe the envelope shape of the cutoff frequency. Orange (HYP3) and Blue (TB-303) When they overlap, they are displayed in white.

In test 1, we compare the state in which the envelope rises in response to an increase in tempo and a series of accents. Since the oscillator is free running, there is a phase difference, but the envelope itself is almost identical.

In test 2, we compare the changes when parameters are changed. The HYP3 Core Engine matches the potentiometer curve and parameter range to the TB-303. This can also be adjusted to suit the individual unit.

In test 3, we compare the results when the same external distortion is applied. Even with distortion, you can get a very similar feeling.

BEHRINGER TD-3 vs ROLAND TB-03 Bassline Battle

video upload by Woody Piano Shack

"Happy 303 day! Playing two TB-303 clones back to back."

TTMC Sequencer Card , Roland TB-303

video upload by Tokyo Tape Music Center

Roland TB-303 SN 253500 w/ Original Sapce Suit

Note: Auction links are affiliate links for which the site may be compensated.

via this listing

'All original, no modifications

Extremely clean and well maintained

Battery compartment show no sign of corrosion or damage

Comes with original silver 'space suit' travel case so you won’t burn up re-entering the atmosphere"

CLICK FOR MORE »

Roland TB-303 Bass Line Synthesizer

Note: Auction links are affiliate links for which the site may be compensated.

via this listing

Additional Perfect Circuit listings

CLICK FOR MORE »

Roland TB-303 Bassline Synthesizer Module w/ Original Box

Note: Auction links are affiliate links for which the site may be compensated.

via this listing

Additional SYNTH CITY Listings

"Super complete and fully serviced 1981 Roland TB-303 Bass Line. Includes the original packaging and vinyl carrying pouch as pictured. Serial No. 174400.

Service notes:
-Replaced Connectors: DC input, Output, headphones, CV and gate
-Replaced 2 electrolytic capacitors connected to DC power
-Cleaned all pots and control switches
-Replaced all tact switches and replaced electrolytic capacitors on tact switch PCB
-Replaced wiring and cleaned battery terminals
-Check calibration and adjusted as necessary"

CLICK FOR MORE »

Din Sync RE-303, Roland TB-303 Replica, Analog Bass Synthesizer

Note: Auction links are affiliate links for which the site may be compensated.

via this listing

"Was built by a pro-tech last year.

Sounds amazing. Raw and full of acid.

Black metal case, green leds, pixie cpu.
Looks killer.

It's the closest you'll get to a vintage TB-303.
It's like buying an 'as new' 303, actually. It's a replica."

CLICK FOR MORE »

Introducing Novation Bass Station by GForce Software

video upload by GForce Software

"Novation and GForce are proud to announce the release of the GForce Bass Station, a brand-new software version of the original analogue synthesiser.

Bass Station is an iconic mono-synth, celebrated for its raw, punchy bass and distinctive analogue filter. First launched in 1993, it has been a core part of Novation's brand ever since.

The new GForce Bass Station AU / VST is an exact emulation of the original Bass Station, now with a new expanded mode, which includes up to 16-voice polyphony and unison modes, taking its versatility far beyond the monophonic hardware original.

More info at https://www.gforcesoftware.com/produc...

Credits
Reverb Machine - audio demo
Graeme Rawson - video production
Çağatay Çetin - 3D animation"

Novation Bass Station by GForce Walkthrough

video upload by GForce Software

00:00 - Intro
00:45 - Overview
02:22 - LFO
03:15 - Oscillators
06:32 - OSC Modulation
07:30 - Filter
08:30 - Envelopes
09:15 - Modulation
11:22 - XMods
14:15 - FX
17:10 - Controls
20:07 - Macros
21:07 - Sequencer
28:02 - Arpeggiator
29:01 - Settings
30:50 - Browser
33:30 - Collections
34:20 - Saving a Patch
35:25 - CC Mapping
36:15 - Undo / Redo

CLICK FOR MORE »

Roland MC-202 MicroComposer w/ Pelican Case

Note: Auction links are affiliate links for which the site may be compensated.

via this listing

Additional Three Wave Music Listings

"Roland MC-202 in excellent condition. Professionally serviced in house. Includes pelican case and powersupply. This unit has been modified: there is an input for CV control of the filter cutoff and an audio in on the side of the unit(see photos)

The Roland MC-202 (MicroComposer) is a monophonic analog synthesizer and music sequencer released by Roland in 1983. It was the first groovebox. Its synth is similar to the TB-303 bass synth and the SH-101 synthesizer, featuring one voltage-controlled oscillator with simultaneous saw and square/pulse-width waveforms. It is a successor to the Microcomposer family of sequencers, including the MC-8 and MC-4."

CLICK FOR MORE »

Roland TB-303 Bassline Synthesizer Module w/ Kenton CV Mod

Note: Auction links are affiliate links for which the site may be compensated.

via this listing

CLICK FOR MORE »