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MODX+ Hiss and artifacting in FM Synthesis

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New MODX+ owner. I’m wondering why I’m getting so much hiss/noise, especially when using the FM Synth patches. I hear it through the studio monitors (old Alesis MK2) and even more so in the headphones(Audiotechnica ATH-M50x). I also hear an artifacting, like a mix of light hiss and flange buried in the notes, like you’d hear from really bad MP3s in the 2000s. It’s not musical, so I’m not sure if it’s a quirk of the FM Synth engine or something wrong. I don’t hear any hiss/flanging unless I’m playing.

The keyboard has a tendency to distort/clip fairly easy in both the monitors and headphones when the master is past 1 o’clock, even though the volume isn’t very loud. Seems like the MODX+ onboard headphone/line out amp is pretty weak and flat. 

So, is the hiss and artifacting normal on the FM Synth? And why does the keyboard clip/distort easily? I have an old Korg Triton, and it’s tried and true. No noise. No quirks. Full, rich sound.

The MODX+ is finicky. I’m hoping it’s user error.

 
Posted : 05/04/2024 4:35 am
Blake Angelos
Posts: 212
Member Admin
 

Hello,

To me this sounds like a gain issue. You only stated your monitors but are you using a mixer? Are you set up in stereo? if you have a mixer, does the mixer have input gain on the channels? MODX+ does not have noisy outputs, and in fact any modern professional piece gear doesn't have issues with noise in the signal for the most part. What causes noise is usually related not having enough input gain at the first point of entry, usually a mixer channel without enough input gain. Sd far as the FM sounds, what particular sounds are you talking about? It's hard to know without some examples.

 
Posted : 05/04/2024 4:37 pm
Posts: 8
Active Member
 

Hello. I noticed the same problem, but in electric pianos fm. I use a lot of electric pianos, like dx or fm piano, and if I increase de volume or put an compressor, i noticed a little hiss sound , or "white noise", when i press the keys until the sound fall out. Specially if we play with low velocity. Iam not used to this, on roland i never experienced this. O other sounds, of the awm2 sounds, for elxample acoustic pianos, this not happen. In this case, it is a characteristic of modx only or fm engine ?

 

Thanks

 
Posted : 05/08/2024 3:29 pm
 Toby
Posts: 366
Reputable Member
 

I noticed the same problem, but in electric pianos fm

As Blake suggested it would help if you have a specific example. Is there a preset that you have this issue with? If so, which one.

Can you walk us through what you do so we can try to reproduce it?

Many of the presets make use of various effects including compressors and there are even special effects that intentionally produce white noise, hiss and even a 'vinyl' effect that has the sound of a needle playing a record.

So the first step I would take with any example you can provide would be to remove ALL of the system and part effects and see if the issue still exists.

 
Posted : 05/08/2024 5:02 pm
Posts: 8
Active Member
 

Hello. For example. In the first preset cfx+fm ep, turn the super knob all to right to increase the mixture to ear more fm ep sound. Then, aply a compressor effect to "punch" more the sound, increase the output volume and turn a bit the treshold in the compressor. Use the headphones (iam using an audio technica ath m50x). Then, play the preset, specially if you play with low velocity, in the middle zone of the keyboard and a little donwn side, you will ear a kind of white noise but much warm during the sound of the ep fm. When the sound fall out or decay, this noise stops to. 

 

With factory preset without apply a compresor you will have more difficult do ear. You must apply compressor and turn the maginc knob to right to ear more the ep fm sound. 

 

But it is present in almoust fm pianos and dx pianos, in some ones you will ear more than others, and you have to always apply a compressor, because the modx to have a better punch sound to ear in the band, you have to apply a compressor, etc etc.

 

I have a analoglab vst by arturia and when i pu a dx7 vst on ep piano, this sound appears to, because they reproduce the original dx7, and theres always a king of hiss and white noite. But its strange , iam not used to it, in my rolands the ep sounds never do that. And i have the modx 8 plus in warranty, i want to understand if its normal.

But iam considering that all fm -x sounds have this noise that i reffer and other user refer.

 

Note, you have to use headphones, because in some speakers you will confund with the hiss of the speakers.

 

Today i will record an example.

 
Posted : 06/08/2024 8:25 am
Posts: 8
Active Member
 

Its not a problem of gains, or other effect. I have many experience , but never had a yamaha keyboard. I use korg and roland, specially roland. Some sounds on roland or other brands, have thar characteristic hiss, hum or white noise, propper to old machines to emulate the old keyboards or shynts, but we know that. In this case, iam try to figure out if all yamahas with fm-x engine produce this natural "dirty", "white noise", "hiss", or if theres any problem with my board. But, this thing only happens in fm-x sounds. In acoustic pianos, etc, awm2 sounds didnt happen. 

 
Posted : 06/08/2024 8:56 am
Posts: 8
Active Member
 

Hello. Here there is a link of youtube, i recorded an audio. Note in the middle of audio, its clearly evident the noise that iam talking about. I only apply a reverb, chorus and a compressor. But i tried without all effects, and its the same. The only think its with a compressor its much mote evident. But i have to apply a compressor, beacuse on modx we have to do that specially on acoustic and electric pianos, to have more presence alive of the sound. 

 

here the link

 

<a title="hissing or white noise modx eps fm" href=" removed link " target="_blank" rel="noopener"> removed link

 
Posted : 07/08/2024 9:19 am
Posts: 8
Active Member
 

Hello. Here there is a link of youtube, i recorded an audio. Note in the middle of audio, its clearly evident the noise that iam talking about. I only apply a reverb, chorus and a compressor. But i tried without all effects, and its the same. The only think its with a compressor its much mote evident. But i have to apply a compressor, beacuse on modx we have to do that specially on acoustic and electric pianos, to have more presence alive of the sound. 

 

here the link

 

removed link

This post was modified 4 months ago by night028
 
Posted : 07/08/2024 9:23 am
Posts: 8
Active Member
 

How can i put an audio? The link that i out is my youtube channel with the audio that i want you to ear, but the link is always removed

 
Posted : 07/08/2024 11:04 am
Jason
Posts: 8236
Illustrious Member
 

youtu.be/rfNzQTTlzI8

 

Maybe try making it less of a link.

 

Seems like most videos are filtered out.

Current Yamaha Synthesizers: Montage Classic 7, Motif XF6, S90XS, MO6, EX5R

 
Posted : 07/08/2024 8:32 pm
Jason
Posts: 8236
Illustrious Member
 

BTW: if you can "EQ" before the compressor maybe you can filter out the highs that the compressor may be amplifying.   At least treat it for now as something real that you could apply normal techniques to in order to squelch the hiss.

 

And if I were to be following along, I'd need to know more about your effects chain applied to CFX+FM EP.  System, master.  Any other changes to the stock Perf.

 

I know you said the hiss is there without additional effects but it's pretty low vs signal as it is (with the compressor active).   

 

I do hear it, so this isn't a dismissal.

Current Yamaha Synthesizers: Montage Classic 7, Motif XF6, S90XS, MO6, EX5R

 
Posted : 07/08/2024 9:20 pm
Posts: 8
Active Member
 

Hello Jason. I only have a compressor, "classical compressor" aplied. The mfx is of, i tried turn off all the effects but it still there. A user of facebook modx group, told me thats normal, dx7 and sy99 has it too. Its the fm-x engine characteristic noise. But iam not used to it, i used roland for many years and in my rd 800, fa08, the eps sound is clear without this hiss. 

 

I was afraid if something was wrong with my board, because is my first yamaha. In awm2 sounds this noise is not present, only in fm pianos, some fm pads, etc. 

 

Thanks for your opinion.

 
Posted : 08/08/2024 8:48 am
Jason
Posts: 8236
Illustrious Member
 

Classical compressor is a system effect (under Variation) or an insertion?  If insertion, what's the order of effects?  The effects routing screen should show most of this at once.

Current Yamaha Synthesizers: Montage Classic 7, Motif XF6, S90XS, MO6, EX5R

 
Posted : 08/08/2024 4:23 pm
Posts: 8
Active Member
 

At the moment i dont have here the board. But i aplly as a insert A , choose insert A for compressor and i choose insert B for Chorus. Iam I doing it right? 

In the insert A, compressor, i choose the classical compressor, put the  treshold to -20 and output to -16 db, more a less....

 

 

 
Posted : 09/08/2024 9:38 am
Jason
Posts: 8236
Illustrious Member
 

InsA and InsB "default" to a series chain where InsA is first and InsB applies its effect after InsA is already added.

 

That's a default and by no means the only option available.   You can route from InsB first to InsA and depending on the TG (tone generator) engine there are other possible options for the routing.

 

The routing screen should show all this in a single view.

 

"Default" I've elected to represent what happens when you use an initialization Performance.  Not starting from finished preset as those all can have the routing any which way.

Current Yamaha Synthesizers: Montage Classic 7, Motif XF6, S90XS, MO6, EX5R

 
Posted : 10/08/2024 1:29 am
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