DolurumMafikala Posted July 3, 2021 Share Posted July 3, 2021 Since I've had the Pod HD500X I've always noticed some high-end fuzzy digital-sounding noises on the Twin Reverb model and I think on the other Standard Pack vintage Fender models too. Recently I tried Peter Hamner's presets http://www.peterhanmer.co.za/hd500x.htm after stumbling across his demonstration videos. His Fender Twin Reverb patch, which runs the Drive at 57%, shows the effect I had noticed. I isolated it in the attached file, which is me plucking the G string. It sounds like a buzz, as if a string is vibrating against a fret (it isn't) or a speaker was loose (this was recorded over USB, no speaker involved). I found I could remove the noise by turning down the Master DEP to about 60%. By default, it is set to 100%, presumably to model the fact the original Twin Reverb does not have a Master Volume knob. Reading some comments by companies that have modelled these early Fender amps it does sound like they have power-amp distortion which is subjectively unpleasant. Maybe what I was hearing was correctly-modelled power-amp distortion and by turning down the invented Master DEP I was removing it by reducing the signal going into the power amp stage. If so, it is pretty cool that the model would do that. If anyone has a real Twin Reverb or Deluxe Reverb or similar I'd love to know if you get a similar distortion/artifacts to the one in the attachment when you turn up past 5. Just out of interest about the model accuracy. Some related comments that got me thinking along those lines: This is from a Line 6 Forum post about invented controls in Helix, talking about the DR rather than the TR: https://line6.com/support/topic/19961-helix-amp-model-gallery-real-controls-vs-invented/ We matched the knob positions in the amp models. If anyone here has used a Deluxe Reverb you know that after about 4-5, the amp stop getting louder. Once the amp goes past 7-8 it can get pretty ugly. The model behaves the same. Once the drive passes 40% or so, it'll never be a clean amp. Cranking the drive will never give a tight distortion, it'll blow out the power amp. Some think this sounds awesome, some think it sounds ugly. That's totally subjective. But if you are using a model and you want more drive, think of how that model would sound when cranked. Sometimes it sounds a lot better to put a drive pedal in front of an amp than to push an amp to its limits. And another from Fractal Audio, again talking about the DR: https://wiki.fractalaudio.com/wiki/index.php?title=Amplifier_models_list#DELUXE_VERB_NORMAL_.28blackface_Fender_Deluxe_Reverb.2C_AB763.29 (fuzzy lows) "That's what those amps do. Always been that way. Just to be sure I just compared the Deluxe Verb model with the reference amp and it's correct. Those are old designs. Simple circuits with minimal frequency shaping. As such there's a lot of bass going into the power amp. That coupled with the resonance magnification of the speaker impedance causes frequencies around the resonance (in the 50-100 Hz region) to distort early. The low E string is 82 Hz so it's right in that zone."  Artifact.mp3 Quote Link to comment Share on other sites More sharing options...
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