Korg Forums

swarupmahapatra · Full Member Joined: 26 Mar 2015 Posts: 124

Hello friends,

I bought a BOSS FV-30L for my KRONOS 2 to use as a volume pedal. When I run the cables from KRONOS to Pedal to Amp, it works fine. But when I run the cables from KRONOS to Pedal to Mixer to Amp, no sound comes out of the Amp. And tried with 2 different Mixers and 2 different amps with the same result.

Anyone else faced the same problem? It’s a low impedance stereo pedal.

Appreciate your feedback on this.
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Thanks
-Swarup
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Korg Kronos 2 61, Korg PA900, Korg NanoPad 2, Roland BA 330

ronnfigg · Posted: Tue May 23, 2017 9:12 pm Post subject:

How about some details about your mixer. Sounds like this is where your issue is.
_________________
"To me the synthesizer was always a source of new sounds that musicians could use to expand the range of possibilities for making music."
Bob Moog

ronnfigg · Posted: Tue May 23, 2017 9:20 pm Post subject:

Does Kronos to mixer work?
_________________
"To me the synthesizer was always a source of new sounds that musicians could use to expand the range of possibilities for making music."
Bob Moog

swarupmahapatra · Full Member Joined: 26 Mar 2015 Posts: 124

ronnfigg · Posted: Wed May 24, 2017 2:32 pm Post subject:

Why not just use an expression pedal on the Kronos. That would help eliminate some cabling which would keep your signal a little bit cleaner.
_________________
"To me the synthesizer was always a source of new sounds that musicians could use to expand the range of possibilities for making music."
Bob Moog

swarupmahapatra · Full Member Joined: 26 Mar 2015 Posts: 124

ronnfigg · Posted: Wed May 24, 2017 4:57 pm Post subject:

An expression pedal connected to the back of the Kronos at the pedal jack should not be eating up any volume. It is not part of the audio chain. It just supplies CCs to tell the Kronos how loud something should be. It also allows you to do some nifty tricks once you get the hang of it. I use one all the time and it keeps me from having to Lug around and plug in a bunch of extra cables. As a matter of fact I don't use analog volume pedals on any keyboard I have. Nowadays every keyboard comes with some kind of a pedal Jack that allows you to control the volume with midi control changes. You would want to make sure you get an expression pedal that has a potentiometer on it to allow you to set the range of the pedal. I could see if you had one that didn't have that it could limit how well the pedal sends out control changes. If you buy the Korg XVP 20 pedal it has an expression pedal output. I have one and the expression output on it works just fine. Never tried using it as an analog volume pedal.
_________________
"To me the synthesizer was always a source of new sounds that musicians could use to expand the range of possibilities for making music."
Bob Moog

swarupmahapatra · Full Member Joined: 26 Mar 2015 Posts: 124

ronnfigg · Posted: Wed May 24, 2017 5:19 pm Post subject:

Since the pedal is a low impedance output it would need to go into a low impedance input (XLR or TRS) on the mixer. Which Behringer do you have? What type of cables do you use at all points in the chain? TS or TRS? And what kind of amp are you using? And sorry, but I have to ask- you are going output to input all along the chain, correct?
_________________
"To me the synthesizer was always a source of new sounds that musicians could use to expand the range of possibilities for making music."
Bob Moog

amit · Posted: Wed May 24, 2017 6:19 pm Post subject:

I doubt it's impedance mismatch issue, had it been high impedance that would have mattered , and would have affected tone bigtime.
These pedals mostly are simple voltage dividers (passive variable resistors I.e potentiometers). This definitely is a problem either with the cables or the pedal unit model itself.
If you using balanced cables first try switching to unbalanced cables. There are certain jacks known to cause issues when using TRS pins as opposed to TR.
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swarupmahapatra · Full Member Joined: 26 Mar 2015 Posts: 124

swarupmahapatra · Full Member Joined: 26 Mar 2015 Posts: 124

ronnfigg · Posted: Wed May 24, 2017 9:33 pm Post subject:

Sounds like everything in your signal path is balanced, but probably NOT the volume pedal. This would definitely be a problem. Being that it sounds like the pedal is used mostly for guitars they probably used an unbalanced circuit. Lets go back to the expression pedal. Here are several good reasons to use one:
1- It is not an audio signal, so it is not susceptible to noise. Also less cords to keep track of. Some pedals even have a jack instead of a hard wired cable so you can replace it in the field if your roadie steps on the while it's plugged in and destroys it. Note: It has to be a TRS cable- TS will NOT work!
2- When used to control volume (Set to Expression CC#11 in Global mode) it controls the volume of a program or timbre without affecting the main volume (main volume knob). If you play a sound that has something like reverb or delay, turning the mail volume attenuates all of the sound, so you don't hear the delay or reverb. Your current configuration would do the same thing. So much for SST! This is what CC#7 does. If you use CC#11 this won't happen.
3- if you are configured as in #2 above you can filter the pedal in Combi Mode. Example- create a Combi with piano on timbre 1 and strings on timbre 2. Make sure they are both on the Global channel. Operate the expression pedal- Both sounds are affected. Now filter the pedal on Timbre 1 in the MIDI Filter page (I've never seen a real piano with a volume pedal- this is the way a real piano works). Now operate the pedal. The strings are affected but the piano is not. So you can fade strings in and out at will. Very helpful.
There are a few other tricks I have read about but have never tried, like using it as a wah wah pedal (now there's a novel idea!). It requires setting it to CC#4 in Global Model and using (I believe) AMS to define it's function. Search the Forums. It's here somewhere.
Hopes this was enlightening. I may have missed a point or two, and I am sure someone here will correct me. Maybe I will make a video of this. If I can find the time!
_________________
"To me the synthesizer was always a source of new sounds that musicians could use to expand the range of possibilities for making music."
Bob Moog

ronnfigg · Posted: Wed May 24, 2017 10:00 pm Post subject:

PS- from the manual for your pedal:
•For low-impedance gear like synthesizers and stompboxes

(I haven't seen too many stompboxes that are balanced)

Connectors:
•Input 1, 2 jacks: 1/4-inch phone type
•Output 1, 2 jacks: 1/4-inch phone type

I think if they were TRS it would say so.
_________________
"To me the synthesizer was always a source of new sounds that musicians could use to expand the range of possibilities for making music."
Bob Moog

adamburgess · Posted: Thu May 25, 2017 5:09 am Post subject:

Spring for a Boss FV500 with the expression connector.
Will work with anything. My Kronos, Stage 2, SY77...

I have three and they're very well made. The pot that works the minimum setting is great for organ. I have two L versions and one H. So, doesn't matter as they don't work in-line but as MIDI CCs.

One normal "stereo" or "TRS" cable and you're done.
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