No Stereo when Input Monitoring?

Hi guys,

Something I’ve only just recently noticed -

When playing a sequence, I have input monitoring on. I am running a Boss RC 505 MK2 into the S2400.

I have obvious hard panning on a few loops on the 505MK2, as this goes into the S2400 it becomes mono or some kind of summed version? Regardless of which setting I have on (I need stereo) the incoming audio is summed and NOT stereo.

I get stereo when in Sample mode.

I have never noticed this before, and it worries me as this is a big part of my sound in studio/live. I desperately need the input monitoring to be stereo.

Could someone let me know if this is something that happens on all machines or whether I have faulty hardware/old firmware?

Currently running firmware Feb 24 2022 and my unit is number 1248. I was waiting to update firmware simce ordering the DSP, which has no arrived.

I have the installation and a repair to fader 1 booked in with Jazzcat this week, I was hoping to get a reply to this question before I drop the unit in on Friday.

Many thanks!
Chris

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The DSP won’t work unless the firmware is upgraded to the latest version, and we definitely don’t offer support for outdated firmware.

Update to the latest (Feb 21,2025) and see if the issue remains. If it does, Jazzcat can take a look at it for you at the same time as the fader repair.

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Thats fine re:DSP , the problem/bug is nothing to do with the DSP card. I don’t get a stereo input when live monitoring, no matter which option. I figured no hardware issue as I can sample in stereo.
Best
Chris

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Have you set up stereo panning correctly on the 2400?

E.g. Shift+Pan and set Ch1 far left and Ch 2 far right? (Or whatever inputs you want the stereo L and R to come in as)

Then select Input monitoring then set to stereo and 1&2 and you should be golden, assuming cables are not faulty.

If this doesn’t work try swapping out different cables to make sure that’s not the issue.

I think I was having the same issue as you until I understood that panning needs configuring and isn’t automatic.

Generally on the panning topic, I tend to always have 1&2 as a stereo bus panned hard L / R then use 3-8 flexibly per project.

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I confirm that input monitoring works in STEREO mode. Note that with the DSP card installed you need to setup panning for channels 1-8 in the DSP Mixer page (BANK+0, then SHIFT + PAD#)

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or press B in the DSP Mixer to edit panning.

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Okay thanks very much for your help and answers guys!

I have read about the panning on this machine in the past and was highly confused if I’m honest!

I am taking the unit and the DSP card to Jazzcat today.

Could you let me know - is it okay to install the DSP THEN update the firmware? Just want to make sure I’ve done everything right.

Many many thanks again

C

I installed the DSP card first and then did the updates afterwards with no problem.

Thank you very much for your responses again. Feeling lucky to have such good support on the forum!

I tried the panning this morning before I dropped it off for repair. It works, but in still a little confused. Ive been watching the manual over and over again - 1 last quick question

I only use main outs left and right, I am still a little confused as to why everything needs to be panned each time… however I’m very happy that this isnt a bug.

My set up is
RC 505 MK2 L+R into
S2400 L+R into
RMX 1000 L+R into
SP 404 MK2

So I’m only using 1 set of outputs, I am confused because most of the infornation available seems to assume we are all using 8 outputs into a mixer (which I used to do)

1000 apologies if my questions are dumb, I do feel stupid as I have owned and used the S2400 from day one.

All the best guys!
Chris

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mains out is not something separate, it is a MIX of the 8 internal channels. and if your (DSP) channels are set up to be 8 MONO lanes, then you need to pan them properly. but you can also set the up the DSP channels as STEREO pairs, then they will be panned L+R out of the box.

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Thanks again.

Half of your response makes sense to me, the other half not - 8 internal channels? When we have 16 polyphony? I have yet to read a post or watch a video that explained the internal panning structure in terms that make sense to me (clearly my fault) .

Perhaps more info on what I want to do might help?

I only use the main outs and use mostly mono samples plus a couple stereo (including the RC 505MK2 going into live inputs)

I bought the DSP card to add reverb, delay and other effects to single channels or on say drums as a whole.

Knowing this, could anyone suggest simple pan settings regardless of the DSP card being installed? I very much feel like I need to get my head round this once and for all before even touching effects!

Again, thank you for your continued patience and apologies if the responses make sense to other users.

Best,
Chris

the S2400 has 8 analog outputs on the back, that get mixed together to make the main mix out. this mix is done according to the pan settings, all this is like on any mixer desk where you have mono channels and a PAN knob.

even with “16 polyphony”, you still have to decide on which of the 8 channels any of these up to 16 tracks get output.

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I definitely understand the 8 physical outs/mixed together to make the main mix out. For the last 2 years I have used all 8 with either a Mackie CR1604 or an LM3204 mixer. I didn’t notice pan (or lack of) until I went back in the box.

What I don’t understand is when I only use MAIN OUTS why each track/sample doesn’t just have its own pan within that stereo mix.
I just don’t see how the pan settings relate to this sorry. It’s equally inspiring as it is frustrating to see so many other users seemingly having no problem with it.

Do I need to go through each of my tracks and re assign outputs 1 to 8, regardless of if I’m only using MAIN OUT? If so, this just doesnt make sense to me!

I feel like I’m not explaining my problem correctly, or asking the right questions. I appreciate everyone’s time.

as said, MAIN OUT is the mix of outputs 1-8 (using the pan settings), there is physically no way to send a track/sample signal only to the MAIN MIX. Each of the 32 tracks from banks A-D goe to one (or two in case of stereo) output which then goes to the direct outs and/or gets mixed into MAIN OUT

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I think you just need to understand that it’s a physical, hardware, circuit-board limitation that the 8 outputs are merged to the Main Mix (inherited from the SP1200 design). It cannot be done in firmware. Therefore, the ONLY way to pan things at the Main Mix is per Output, not per sample.

(what @av500 said above, just in different words)

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Maybe some diagrams in the manual showing the structure and the audio path would help.

I’ve always thought that it is complex when dealing with headphones, separate outs and USB. I don’t have the DSP card but it may have added another layer of complexity on top of that :slight_smile:

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After reading all of your answers, I still just find the whole panning thing odd… honestly here was me thinking:
“I have loaded several samples, 1 of which is stereo the rest are mono, now to pan them in the stereo field”

Maybe a diagram might help me and other users? Im usually a pretty good problem solver in life so this has really perplexed me. I have physically used the panning and got results, results I just didn’t really understand.

Is anyone with me on the panning part of the machine or am I just mad?!

we are all mad here :grinning_cat_with_smiling_eyes:

You may be confusing a 2-channel stereo sound with panning. A stereo sample uses two channels. What happens when you play a stereo sample through channel 1 & 2 on your mixer, and the panning control of both channels is set in the middle? You’re hearing both sound channels, but equally through each speaker so it sounds like a mono sample. Now pan each channel left and right respectively. Ah, now it sounds like a stereo sample with each speaker outputting an independent sound channel.

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No - this isn’t what is confusing me.