Zeppelin Design Labs

brach

Forum Replies Created

Viewing 15 posts - 1 through 15 (of 167 total)
  • Author
    Posts
  • in reply to: Extra noise #15546

    brach
    Moderator

    Mike,
    Once again, sorry for the confusion and the misleading/wrong info in the user manual.
    Keep playing with the trim pots. Hopefuly you’ll find a setting that works for you.
    Let me know if you have anymore questions.
    -Brach

    in reply to: Extra noise #15517

    brach
    Moderator

    Mike335,
    I’m sorry for the confusion.
    Thank you for pointing out this discrepancy between the Quaverato user manual and assembly manual.
    The assembly manual is correct. The gain increases as you turn the gain trim pot counter clockwise. The tone trim pots are just the opposite, clockwise increases volume output.
    These are 25-turn trim pots…so you probably won’t notice much change if you only turn it a little bit…at least with the gain trim pot. You just have to keep turning it until you hear the volume change. As you keep turning it, there will be one area that it really starts to change and you’ll notice it. You’re right, they don’t have any stops to them so once you get to the end of the pot’s 25 turns it starts making a little clicking sound as you turn it, indicating it’s not adjusting anymore.
    You probably don’t need to unsolder the jumpers to reset the tone trim pots…just use your ears. It also may help to use “calibration mode” to set the tone trim pots. The gain trim pot can always be tested via test points 5 and 6, as long as the pedal is off.
    Once again, sorry for the confusion.
    Let me know if you have any more questions.
    -Brach

    in reply to: Extra noise #15136

    brach
    Moderator

    This sounds like either the PWM is leaking into the signal path or the power supply is noisy. First of all, try to switch power supplies to a liner type (instead of switch-mode)…make sure it’s rated for at least 100mA. See if this helps.
    If the PWM is leaking into the signal path, this can usually be helped by adjusting the high and low trim pots down in volume. Also play around with the gain trim pot to adjust the ratio of high/low trim pot volume to gain trim pot volume. This noise should decrease as you get the trim pots set in a good ratio.
    Good luck.
    -Brach

    in reply to: no sound #14938

    brach
    Moderator

    Thats good about the power supply.
    Now, make sure you have clean solder joints.
    Good luck.
    -Brach

    in reply to: no sound #14891

    brach
    Moderator

    Well, i’m glad to hear that something fixed the no noise issue. But since you don’t know what solved it, it may not actually be fixed and it may stop working again. The high pitched noise may be related to the same issue. Make sure your solder joints are very solid, fully connected and nothing is bridged. There are lots of things you could be getting this high pitched noise from. One of them is the power supply. You can try to use a battery to see if that would help, or a linear power supply (not switch mode) like the Boss PS series…basically anything with a heavy transformer in it. Another thing that could be causing the high pitched noise is the PWM signal leaking into the audio signal. Since this noise is adjustable with some controls, this is probably what it is. Hopefully cleaning up your solder joints will help with this. Lowering the volume of both the high and low signal paths may also help with this.
    Keep me posted about your solder joints.
    -Brach

    in reply to: no sound #14880

    brach
    Moderator

    By obvious i assume you mean the jumpers have been soldered and the guitar and amp are in the correct jacks?…I don’t mean to be insulting, but this happens even to me sometimes.
    What board version do you have?
    -Brach

    in reply to: Quaverato GitHub resources and instructions #14879

    brach
    Moderator

    These lines have to do with the “Quiet switching” feature (in board version 8.2), in which the audio signal is shunted to ground via a FET before the relay switches, and then after the relay switches the FET switch is relased and the signal is passed through to the output again. All this happens in about 25mS or so.
    This helps with the audible relay click that happens sometimes.

    in reply to: Bypass Switch Not Working #14637

    brach
    Moderator

    Make sure that pin 11 on the microcontroller is being low (close to 0 volts) when the bypass mode is enabled. Also make sure that when momentary mode is enabled pin 11 goes high (close to 5 volts). Test this and let me know what you find.
    -Brach

    in reply to: loud sharp sound when cuttoff is high #14626

    brach
    Moderator

    Nick,
    That’s the speaker being overdriven to the extent that it’s voice coil is hitting the speaker magnet. The little on-board speaker isn’t meant to reproduce the sound very accurately, it’s just meant as somewhat of a monitor to let you know the Macchiato is making sound at all. So it can be misleading when it causes problems like this. In fact, the next version of the Macchiato (which we are currently working on) will not have an on-baord speaker, partially to keep issues like this from happening.
    To cure this problem, just lower the volume of the Macchiato.
    Sorry about this issue.
    Take care,
    -Brach

    in reply to: less highs when engaged… #14625

    brach
    Moderator

    YummyFuzz,
    I’m glad to hear that mod is working for you! It sounds like you did a good job tweaking the trim pots to get the sound you want. That’s just what I hope people do with the Quavearto!
    Take care.
    -Brach

    in reply to: No output signal? #14431

    brach
    Moderator

    Thanks for the new sound file.
    I know this sounds dumb, but make sure the cables are plugged into the correct jacks. This mistake happens to me every once in a while because i’m not paying close enough attention when the pedal is flipped upside down. If that’s not the issue, continue…
    Plug in amp to the pedal. Make sure the pedal in engaged (not bypassed)… With a metal object, like some tweezers or screw driver, that you are holding (make sure you are holding the metal part of the tool) touch the tip of output jack…you should hear a loud noise from the amp. Then touch pin 6 of U2 (the first TL072 in the signal path). You should hear a similar loud sound from the amp.
    Did these two points make the expected noise?
    Let me know what you find.

    in reply to: How best to test for no signal? #14430

    brach
    Moderator

    Dan,
    I’m glad it’s working now. Good job!
    You don’t need to re-calibrate the trim pots with a meter now…if the tone needs adjustment, just use your ears and make the adjustments that way. The calibrations process with the meter is just supposed to get things in the same ball park, after that you need to use your ears to tweak the tone the way you like.
    -Brach

    in reply to: Pedal done and working despite roadblocks #14429

    brach
    Moderator

    I’m really glad you are enjoying your Quaverato. Good job making it look unique…it’s looks great! I love it when our customers mod our kits to personalize them…that’s what DIY is all about…being creative and tweaking things to personal taste.
    Take care.
    -Brach

    in reply to: One more question about Midi Gnd Lift #14395

    brach
    Moderator

    Good idea.

    in reply to: Quaverato Troubleshooting #14394

    brach
    Moderator

    The pedal uses around 50mA, so to be safe use a power supply capbale of suppling 100mA.

Viewing 15 posts - 1 through 15 (of 167 total)

avant-garde audio & electronic products