Re: [AH] Noise with distortion pedal - what countermeasures may I take?

From Tom Bugs
Sent Fri, May 3rd 2019, 06:55

Also possibly worth experimenting with how you power the TB303 - based 
on varying noise levels I've had with 606s in the past dependent on PSU 
type. Cheap modern switchers can be horrible! Perhaps see if batteries 
produce lower noise levels and then work from there.

On 03/05/2019 04:04, Ben Bradley wrote:
> Distortion boxes are essentially compressors (in addition to
> drastically changing the tone color) and so are going to boost any
> noise present in the input. It may help to reduce the signal level
> going into the distortion, though of course this gets you less
> distortion as well. A limiter would also amplify the noise relative to
> the signal level.
>
> The off-the-shelf solution is a noise gate (pedal/effects box). Try it
> between the TB-303 and the distortion, or after the distortion. Either
> way should help, but one may be better than the other.
>
> On Thu, May 2, 2019 at 9:25 PM Ryan Palmer <xxxxxxxxxxx@xxxxxxx.xxx> wrote:
>> Can you describe the noise? In my experience, Roland’s of this era used JRC4558’s extensively, and they are prone to bleeding digital noise into the final amp stage. This is most notable with high gains, or compressors following it. I imagine a distortion pedal would also make this more apparant due to the high amp gain.
>>
>> I’ve seen/heard this in 808’s, 606’s and Jupiter 8’s, the solution was to replace the final amp stage with a ne5532.
>>
>> Sent from my iPhone
>>
>> On 30 Apr 2019, at 3:07 am, Boniforti Flavio <xxxxxxxxx.x@xxxxx.xxx> wrote:
>>
>> Hi all.
>>
>> After getting a couple of distortion pedals for my TB-303 (read my older post if interested - also in suggestions other ppl made), I somehow got stuck on the Ibanez TS9. I like its sound, although the BOSS OS-2 is quite a good candidate as well.
>>
>> Anyway, let's get to the point: I found the TB-303 generating a hiss when passed through the OS-2 and no pattern is playing (but still the sequencer is running, as I'm maybe in the middle of some jam). The hiss is less present when a pattern is being played through the OS-2, but still can be heard. For the time when the TB-303 is not playing, I thought I'd add a limiter after the OS-2 and that would do the trick. BUT! How can I get rid of this hiss when playing a pattern through the OS-2?
>>
>> I think it's the same behavior with the TS9, but I don't use it now because when connected, and one of my Beatstep Pro is also powered on, there's an annoying noise in the audio that can be heard through the speakers too :-(
>>
>> Thanks for any help on both the above issues...
>>
>> F.
>>
>> https://soundcloud.com/bonnyfused

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