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Post by arti on Feb 28, 2019 15:01:05 GMT
I've bought two identical mono cords for both audio outputs of Master I/O module: 3,5mm-5,35mm. I plug them into L/R inputs of my mixer. Than the sound goes out through main L/R output to two inputs on Zoom recorder,where it goes to stereo track.
I've tested the cords seperately. One of the cords works fine on both Module's outputs and both mixer's inputs, the other doesn't work on any (the sound is very thin, quiet and heavly distorted. But both pluged in at the same time seem to work ok - the sound is getting stronger on both speakers and the audio signal is equal on both stereo parts of the track (as observed on Zoom display).
During further tests came out both of them work perfectly well with other one-cable devices (Korg Volcas) and yet, plugged seperately to Master I/O outputs they behave different one from another. Any ideas for such a strange behaviour? The mixer is Behringer xenyx1202fx, I use L/R stereo inputs. I probably don't understand something, and it's kinda ok with both them pluged in, yet it puzzles me and I'm not sure is everything as supose to be or not with my module.
Would be grateful for any ideas, I'll do my best to answer further questions, although my technical knowledge is very limited.
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Post by admin on Feb 28, 2019 22:03:48 GMT
Hi arti, unless you use the MultiFX module or the HPAMP module, the system is basically Mono. This means if you only patch an oscillator into Audio1 then you will only get sound out of the left channel. If you want to get sound on both channels then you have to also put a signal into Audio2. I'm currently travelling so I can't make a video of this, but I'll make one next week when I'm back home to demonstrate. I think it's an important point to explain about the system. |
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Post by thetechnobear on Mar 1, 2019 12:28:01 GMT
this reminds me  robertlanger perhaps a new revision of the master module, could inherit some of the recent improvements from other modules, particularly : a) Audio 1 jack be stereo (same as 4IO) b) Mono switch, for Audio 1 (like HPAMP) c) reinforced jack plate, like 4IO, HPAMP none, are really necessary, but I find it really useful having stereo jacks when recording directly (e.g to something like a camera or Zoom) , currently Ive resorted to using HPAMP for this. (which is fine, as has 2 outputs which is useful) (bonus: having a gain knob on master, like HPAMP would be useful, but thats more a functional improvement ) |
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Post by arti on Mar 1, 2019 17:44:16 GMT
If you want to get sound on both channels then you have to also put a signal into Audio2. Yea, I put signals into both audio slots, I could hear it from both audio outputs with one mono cable no matter which output I tested. The other cable seemed to malfuncion on both outputs, but somehow with both in the audio outputs (I can interchange them, it doesn't matter which is where) the sound seems to be ok. Strange! Nevertheless looking forward to Your video! |
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Post by robertlanger on Mar 2, 2019 6:16:55 GMT
arti Indeed a quite strange behaviour; first it sounds like a missing ground/shield connection, but on the other hand the cables work well separately with other devices... You might try the following: Insert the cable in the MASTERs IO socket and play with the insert heights, push it in fully, pull it back minimally, like this... Perhaps there is a position where the ground connection gets established. By this we can find out if this is the reason... If yes, the solution is, ahem, have to think about it ;-) BTW your description of the issue was very clear and informative!
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Post by arti on Mar 4, 2019 9:38:35 GMT
arti Indeed a quite strange behaviour; first it sounds like a missing ground/shield connection, but on the other hand the cables work well separately with other devices... You might try the following: Insert the cable in the MASTERs IO socket and play with the insert heights, push it in fully, pull it back minimally, like this... Perhaps there is a position where the ground connection gets established. By this we can find out if this is the reason... If yes, the solution is, ahem, have to think about it ;-) BTW your description of the issue was very clear and informative! Thank You for trying to help me. I tried to find is there any spot where the cable works, but no. With two separate sound sources (one from the mixer without delay, the other straight from the delay) to make the distinction between each channel, I've received the same results as mentioned before. One cable sends clear signal to one ear on any I/O audio output, the other sends broken on both outputs no matter how I molest the insert  When both are plugged in at the same time - I hear clear signal on both ears with both channels (delayed on one ear, clear on the other). I've also tested the I/O outputs with headphones plugged directly - one output at a time - each one sends audio to one ear as it should be with stereo jack inserted. I've also tried to use volca cables (stereo mini jack to mono jack) and they don't work at all. BUT with the "broken" cable inserted I put the non working volca cable to other I/O socket, and the broken one starts to work! |
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Post by thetechnobear on Mar 4, 2019 10:38:32 GMT
Perhaps the ‘dodgy’ cable has an unreliable ground link. (Sleeve)
So when you have both cables plugged in, the ground is taken from the good cable, but without this good cable there is a floating ground.
If you have a multimeter you could test the cables.
(Another less likely possibility is that the ‘dodgy’ cable is actually ‘floating ring’ cable )
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Post by robertlanger on Mar 5, 2019 7:24:07 GMT
Perhaps the ‘dodgy’ cable has an unreliable ground link. (Sleeve) So when you have both cables plugged in, the ground is taken from the good cable, but without this good cable there is a floating ground. If you have a multimeter you could test the cables. (Another less likely possibility is that the ‘dodgy’ cable is actually ‘floating ring’ cable ) Agree; sounds most likely to me! |
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Post by arti on Mar 5, 2019 11:01:20 GMT
Perhaps the ‘dodgy’ cable has an unreliable ground link. (Sleeve) So when you have both cables plugged in, the ground is taken from the good cable, but without this good cable there is a floating ground. If you have a multimeter you could test the cables. (Another less likely possibility is that the ‘dodgy’ cable is actually ‘floating ring’ cable ) Agree; sounds most likely to me! Unfortunately I don't have multimeter, and even if I would, I still wouldn't know how to use it So using both cables at once makes the "broken" to work properly, because it takes what is needed from the other, healthy one. If that's the case then there is no problem for me, as I intend to use them both all the time. The case is closed But does Your explanations fit to the fact, that each cable works perfectly well with volcas? |
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Post by thetechnobear on Mar 5, 2019 13:06:39 GMT
But does Your explanations fit to the fact, that each cable works perfectly well with volcas? possibly, it could be the volca is establishing a common ground (to the mixer) via the PSU. but really the only way to know for sure is to use a multimeter. if they have decent screw connectors at the ends , you can take them apart and re-solder the connectors (often its just cold solder joints that have cracked slightly), otherwise Id grab another cable to maintain my sanity dodgy cables and ground loops are the two things that really wind me up , when im trying to record stuff! |
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When both are plugged in at the same time - I hear clear signal on both ears with both channels (delayed on one ear, clear on the other). I've also tested the I/O outputs with headphones plugged directly - one output at a time - each one sends audio to one ear as it should be with stereo jack inserted. I've also tried to use volca cables (stereo mini jack to mono jack) and they don't work at all. BUT with the "broken" cable inserted I put the non working volca cable to other I/O socket, and the broken one starts to work!