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zappazapper

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zappazapper last won the day on October 26 2020

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About zappazapper

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  1. No, I'm saying do a null test and then you can analyze the difference. Humans are terrible at detecting differences in audio, but have boundless talent for claiming that they can. Doing a null test and posting a response curve would set the record straight.
  2. OK, I have to apologize. My thinking on this subject has been too linear. Our use of the signal may travel in one direction, but signal and its associated phenomenon are bi-directional. When I was thinking that the problem was between the Helix FX Send and my amp, I should have been thinking more about the interface between my guitar and whatever it's plugged into. The impedance of my amp's front panel input is irrelevant as far as the Helix FX Send is concerned. All I'm doing by using a reamp box is incorrectly loading the signal coming from the Helix - not only does this not load the pickups on my guitar correctly, but it incorrectly affects the signal coming from any blocks I place before the Loop (not to mention that there is at least a remote possibility of damaging either my Helix or my amp). It was suggested on this thread to experiment with the input impedance setting on the Helix, and I quickly dismissed it - "that's not the problem!!" Part of the reason is that there was no option to select input impedance on my X3L, and using a reamp box was the next best thing to accepting the "screamy" tone I would get in 4CM, and so it was hard to let go of the interface between the Helix Loop and my amp being the source of the problem. I tested the front panel input on my amp using a range of test-tone frequencies. The results vary but it's safe to say that it's far below 1M. If I had to pick an average I'd say it's around 400k. The next highest option to 1M for "Guitar In-Z" is 230k. With the Loop set to "Instrument" and the "Guitar In-Z" set to 230k, it definitely sounds as close to plugging straight into the front panel as I've ever heard with a reamp box. So I consider this issue to be resolved to my satisfaction, and again I'd like to apologize for being so dismissive and difficult, if that's the impression I was giving. Further to that, I was considering the implications to input impedance and the "first active block" option. If I have to set my input impedance to 230k to get my amp to sound right, then I am no longer able to take advantage of the variable impedance of the Auto setting. I had an idea that there could be a setting on the Loop blocks that would tell the Helix what impedance it should use when the Loop is the first active block and "Guitar In-Z" is set to auto. I plan on posting an IdeaScale article soon. Now that 3.1 is on the books, I feel compelled to embark on a lobbying campaign to have a few of my IdeaScale ideas at least be considered for 3.2, and this is near the top of the list. Thanks again for all the patience you had with me.
  3. If I may. I was having issues with running the preamp of my amp in 4CM in parallel with a Helix amp model and the issue was latency of the FX Loop. After some testing with a correlation detection plugin in Reaper, I figured out the round trip latency of the FX Loop was around 1.8 ms. Not claiming this as indisputable objective fact, but putting two Simple Delay blocks (one at 1 ms, the other 0.8, since 1.8 ms is not a delay time that exists on any delay block) on the path with the amp model solved the problem completely, at least subjectively. Not sure if the rest of the I/O has the same latency characteristics, but I'm also not sure why they wouldn't.
  4. I was looking at this: https://amtelectronics.com/new/amt-incinerator-ng-1/ It's a noise gate with a loop. It uses the level at the input for its detector, and then applies the gain reduction to the signal coming back into the return jack. AFAIK, none of the gates included in the Helix work this way (we all know that L6 doesn't provide a ton of information on the individual effects; Helix Help doesn't mention anything about it either). I'd be interested to hear some thoughts on this, whether anybody has used a gate like this, whether they work better than a "normal" gate, whether it's got any appeal to Helix users besides me, or whether I should just shut up and buy one of these and put it in one of the loops.
  5. Every Preset has an output volume. Turn it up. Different blocks have a different effect on volume. It's not a glitch. That's why there is a per-Preset volume control.
  6. It took me a while to get the testing rig together. I bought a 1M pot, soldered everything together, then realized my multimeter's AC voltage setting options are limited to 750v and 200v. So I had to get a different multimeter and they've put restrictions on stores here in Ontario that sent me on a little bit of a wild goose chase. By the time I got everything together today I only managed to test the front panel input and the effects return on my amp before I had to meet with my girlfriend for dinner. Front panel input - 370k Effects return - 41k I did the tests with a 1 kHz tone. I don't know what kind of effect frequency has on this test and didn't have time to experiment. Maybe someone can chime in on the subject. Also, I don't pretend that these are definitive numbers since I haven't done the test enough to fully accept the numbers myself. Just wanted to put them up here and see what reactions they get.
  7. There definitely is a difference in signal level but even when you turn the Send Level down to a point where it's now noticeably lower than plugging straight in, you still hear it. And then you plug the reamp box in and it's just right, except like I said in a subsequent post, I did end up noticing that there was a little bit less gain with the reamp box, but turning the Send Level up to +6.0 fixed that.
  8. So I was reading that article that @Schmalle posted (https://www.harmonycentral.com/articles/effects/how-to-test-input-impedance-for-guitar-effects-and-amps-r428/) and I came across this: It is possible that the reason I'm getting a "screamy" tone in 4CM without the reamp box, regardless if I use my X3L at 100k or the Helix at 2k, has less to do with the impedance and more to do with the fact that both multi-fx units are outputting a buffered signal at their Sends when my amp's front panel input is expecting an unbuffered signal? And therefore is designed to compensate for the lack of high end in an unbuffered signal, and so is adding high end to a buffered signal that isn't experiencing high frequency loss in the first place?
  9. It might be a little more obvious if you look at the LT. The 8 "middle" footswitches are for selecting Presets in Preset Footswitch Mode, 4 on top and 4 on the bottom. So the Banks are based around the number of footswitches on each row that can be used to select Presets, and you have access to two Banks at a time. Just so that you're using the same terminology as everyone else, the number is the Bank, not the Preset, and the letter is the Preset, although if you said "Preset 17C" everyone would know that you're talking about Bank 17, Preset C. It's just that nobody ever says "Preset 17, version C". The two footswitches to the left of the "middle" 8 are the Bank Up and Bank Down switches, not Preset Up and Preset Down, although they can be configured as such by pressing and holding both switches simultaneously, which cycles through a few different configurations (Bank Up/Down, Preset Up/Down, Snapshot Up/Down). Well, the Helix certainly isn't the first multi-fx to have footswitches for selecting presets and navigating banks, not even L6's first. But I think the Pod XT Live might have been the first to use lettered presets and numbered banks. I don't know if it had anything to do with organizing presets around songs. I think it had more to do with making it easier to find a preset. My first multi-fx was a Digitech RP2000, which had 4 footswitches for selecting presets and a single switch for navigating banks, and the presets were numbered 1-64. So if you wanted to find, say, Preset 57, you had to do some quick math in your head. With lettered Presets and numbered Banks, if you know you want, say, Preset 17C, you have a clear map of how to get there.
  10. I'm assuming you got those from the schematic? What's the impedance of the Helix 1/4" output then?
  11. You know what the impedance specs are for the effects loop of MY amp? By all mean, please enlighten me...
  12. ...which is why I said you made a good point. There's nothing wrong with pointing out possible workarounds in the current firmware, especially considering the amount of time it would take for this feature to materialize even if there was unanimous agreement. But this thread, ultimately, is a place to discuss the possibilities for future updates. I guess I just don't want the discussion to end with "here's a workaround. Next." I didn't say separate Amp and Cab Blocks was a downside, I suggested that with any "innovation" comes consequences, downsides. The downside to the Amp+Cab block is that someone could suddenly decide they want to try adding a second cabinet. The downside to separate Blocks is that it takes up an extra slot. In either case, the process for switching from one to the other isn't particularly user friendly, and if L6 were to make it more user friendly, then those downsides wouldn't really exist anymore. That's all.
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