JOYO Bass Compressor Guitar Pedal, Optical Circuit with Attack/Release/Ratio/Tone Control & Bypass (SCYLLA R-27)

Believe the hype this works great. I was used to virtual studio compressors so when I bought a bass one, the Lax comp by Donner, I wasn't sure what to do and couldn't get a sound I like with just attack release and two volume controls. This having a ratio and tone function, in addition to it not having much of its own sound, unlike the LAX which makes the sounds it makes and not much else as far as I can tell, made it immediately more fun and understandable for me.So far I haven't had it for more than an hour but first impressions are very good.Normal size, massive value.

Fine does thejob

So subtle with all controls turned to noon ie halfway that I thought I’d bought the emperors new clothes! Two things are important to say, firstly different bass guitars will definitely sound different with this gizmo, I tried it eventually with extreme settings on a fender jazz bass and it gave me a slowed percussive sound but on another more expensive active pickup bass there was a very slight effect with the same settings. That may be why different people will experience different outcomes and need different settings.Secondly the release control is a slow release turned fully anti-clockwise, try turning output gain to say 9 o’clock but input gain to fully clockwise ( ie all the input signal gets compressed) then turn all lower knobs fully clockwise except release which should be set fully anti clockwise. By following these settings you should hear the maximum compression this unit is capable of, after that dial back any knob to reduce the effect. It took me quite a while to find out the above and as I said before, up to that time I thought the thing wasn’t doing anything at all much except lower my overall volume quite a bit, to compensate for that I turned up the output gain bearing in mind that any high gain adds more distortion to the signal.Overall I was pleased with the effect of this pedal and somewhat relieved to find it had one! I think overall compression on stage is a bit overrated, for a pub band for example it’s probably unnecessary ( you won’t hear an appreciable difference) and for large venues it’s best left to the mixer out front. However if you want something subtle which seems to clean up the signal from the bass quite nicely then this particular compressor is a reasonable buy at a reasonable price.As an aside it might help if other reviewers mention which bass guitar they’re trying it out on as effects seem to vary a bit.

At this price point I don't think you'll find a better compression pedal.I've tried more than a few over the years and this is better than the cheap ones and as good as the high end ones.It isn't entirely transparent unless you leave the tone control alone. It adds sparkle one way, a Jamerson thump the other.There is great flexibility across the controls and yet I found it very simple to dial in a nice, tight sound.Don't be fooled by the price - this is a great compressor.

Having plodded away with the Behringer BD! 21 for so long with satisfactory results, I thought I could maybe have more control with a different pedal, so I opted for the Scylla and boy, am I glad I did. The sound I can now achieve is more what’s in my head. By changing the parameters on the compression and tone controls I can create more sustain. The combinations possible makes this a pedal I wish I’d got some time ago.

Excellent product

The pedal seems well constructed. For the money, it offers a surprising amount of control. There are large input and output knobs, plus smaller controls for ratio, attack, release and tone. Between all of these, there is plenty of scope to dial in the sound you’re looking for. A switch to turn the effect off completes the controls. There is a status light between the smaller controls and the foot switch along with an led border on the back/front of the pedal which can be set to off/on or in sync with the status light. Battery operation is not possible, nor is a power supply included, but most of these will probably end up on pedalboards along with a few other devices.I’m probably in the minority, but as someone who also mixes recordings, I’m firmly of the opinion that all bass guitar parts require at least a tiny amount of compression, just to even things out and tame the occasional excessive transient. Some would argue this is not necessary live, but that has not been my experience. I’m a somewhat heavy-handed player (a bad habit that I’m too old to correct), so this becomes even more critical for me than perhaps it would be for a more even player. Adjusting the controls, I found it fairly easy to dial in the sound I was after. Further experimenting revealed a large range of possibilities and everyone should be able to find settings that suit.I was quite surprised to find this range of controls on such a competitively priced pedal. Someone less familiar with compression techniques & parameters would probably need to do a bit of homework to get the best out of this pedal, however I would say that this effort would pay off. A very tweakable pedal that offers great value for money.

This is reviewing the Joyo bass compressor.First, the reasons I only give it 4 stars...There is a gain reduction indicator, but it's hard to spot because it's fitted in with the bypass indicators, which I find much too bright, also making it hard to read the knob legends.It needs a good, well filtered 9v power supply, otherwise it can produce a nasty whine.The documentation does not mention the gain reduction indicator, and the on-line reviews I found didn't notice it either. They also don't say what the compression method used is. I can tell you it is the traditional optical, using an LDR (light dependant resistor).I did take mine apart as I was really curious about its workings. Furthermore, I found a very good design and build quality. It is not a simple device. The LEDs are surface mounted and feed clear plastic light guides. The gain reduction LED is a single red in between a pair of green LED's which both light when the pedal is active. Gain reduction therefore shows as yellow! But, as I said, it is a hard to see it happening.The top footswitch operates a chunky PCB mounted button switch and a small relay working from that provides true bypass of the effect. The LDR and its light source are hidden in a lightproof box. There are several opamp IC's marked 2272 which I suspect are TLC2272, a low-noise CMOS type with very nice clipping characteristics. There is an ICL7660 type chip which I suppose is making an extra power voltage from the incoming 9v - this would be the reason for whining noise if a poor power supply is used. I put it back together with no trouble, which is a sign of good engineering design.I'm familiar with many classic effects circuits, but I've no idea if this is a clone of anything or original.It works as expected. Extreme compression ratio can suck out all the attack if that's your thing, otherwise it can do transparent standard peak level reduction as well as anything. It's a shame the gain reduction indicator is so hard to see, that would make setting it up easier.

Confermo la maggior parte delle recensioni che potreste trovare online. Questo pedale ha un ottimo rapporto qualità/prezzo, delle configurazioni molto approfondite e non sempre presenti su pedali simili per fascia di prezzo, costruzione solida e visivamente carino. Spedizione arrivata nei tempi indicati

First off I want to say the pedal is awesome for the price point! It was pretty easy to dial in, I found some YouTube videos and online stuff to help me do it as well. BUT, I did run into an issue mid December (2025) where it wouldn’t power up properly and when it did it was pure distortion. I had it on a nice Guitto board and plugged into my Vodoo labs power. I reached out to Joyo directly and to not only did they respond within a couple of days , they helped me out in HUGE way!I mentioned I have a gig coming really soon and I was hoping we could resolve this quickly of course. They asked for a video with some instructions and where to send or share for them to review. So did that and uploaded it to them the day after, and within twenty four hours they got to me. To my pleasant surprise they (Specifically Zeng) said it was blurry and a little hard to make out in their end, but no worries they made arrangements with Amazon fulfillment and are sending one to me and will be there by Dec.30; it arrived two earlier than that and it works great! And when I asked them the next steps for the warranty issue they said I could keep the defective one and do whatever I would with it! I am aware of all the costs for shipping products like that back vs the cost of sending one and not worry about it, obviously. The fact that they did this for me in such a short manner and the level of customer service I got is lost these days and hard to find. They actually cared about my situation and took until regard that I am a customer who owns more than one of their products and have become a fan of their stuff, and they care bout that, is very uncommon these days. I am cheering this company on and I hope they keep this up! Thank you Joyo! I appreciate your help here!🍻

El compresor es un pedal controversial, pero una vez que lo pruebas sabes sus ventajas, este modelo y marca son excelentes, da una vida distinta al sonido del bajo.

Great Compressor! I leave it on all the time. Plenty of dials to get what you want out of a Compressor Pedal. I love it, and the price is a steal! JOYO is knocking it out of the park!

What a great compressor!! It's hard to find anything like this at this price—I've been enjoying it for over half a year now! It works great with 4-string basses; I'm still testing it with 5- and 6-string basses.