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  • June 9, 2011 at 12:19 am in reply to: Nano Switchblade Channels Mixed?? #115453
    Damage Inc.
    Participant
    Quote:
    right, i’m saying that since they’re both ‘on’ all the time, that there might be signal from one going out the other. It’d work like that since a wire is not a one-way street. are you following my train of thought here?

    you ever hear the story of how David Gilmour got the seagull sounds on ‘Echoes’? had his wah plugged in backwards?
    that’s kind of similar to what I’m thinking is happening here.

    tl;dr version of what I’m thinking is happening:
    The signal is going in on channel 1 and going until it hits something polar [that is, passes signal in one direction only- a diode, certain types of capacitors, some types of semiconductors] or until it hits a resistor that has a higher resistance than its signal amplitude [volume].
    now, normally, that wouldn’t really matter but I’m thinking channel 2 meets up with it before anything that would prevent the signal from backtracing. So not only is channel two an input, it’s an output, like on a DI box. That second channel input-output is going out into the DM4. Most pedals, again, wouldn’t matter because there’s something polar stopping backtraces into it- however distortion pedals use two diodes [a clipping stage] that are connected to the ground portion of the pedal. The diodes are attached to a resistor but not a big enough one that it’s preventing signal from coming back in [yielding distortion]
    which is then being sent back into the amp from the same direction it came.
    all in a matter of milliseconds.

    So, from the DM4, it sends a bit of signal back into the Channel B of the Switchblade
    and it comes along with the signal that goes through Channel A?
    I did read before buying that it acts in two ways, so maybe it’s because it can do that, that is happens.

    Quote:
    which I why I hypothesised that plugging a tuner input into the second channel’s input would result in the tuner picking up the signal.

    OK, I will try the tuner-test, but to be sure, that would be:
    Guitar > Switchblade
    Output A > Amp Channel 1
    Output B > Tuner > Amp Channel 2
    Correct?

    Quote:
    What’s the amp, out of curiosity?

    The amp is an old LabSeries L7.
    Not sure if you know it, but it’s this 4×10 100W transistor-combo.
    I read once that it was manufactured or owned by Gibson or something.

    June 8, 2011 at 8:06 pm in reply to: Nano Switchblade Channels Mixed?? #115460
    Damage Inc.
    Participant
    Quote:
    Quote:
    I’ll try all that later on.

    But isn’t it clear when I actually HEAR the DM4 (taking the signal from Channel B)
    through the sound of the OTHER signal (fed from/through Channel A) that you hear them not actually separated?
    I mean, it might not be common that you have 2 instrument-inputs on an amp and also both always hot.
    But if you switch between 2 signal-paths on a device, they should definitely be completely isolated from each other.

    I’m also not sure what you mean by if the inputs of the amp are connected.

    right, i’m saying that since they’re both ‘on’ all the time, that there might be signal from one going out the other. It’d work like that since a wire is not a one-way street. are you following my train of thought here?

    I think so.

    So that there’s a little bit of signal going through the cable attached to Channel 2 on the amp?
    But wouldn’t that mean it’s leaking from the B-Output on the switch?

    Otherwise I’m not sure how there could be signal going somewhere through the amp
    coming from the channel the switch-pedal isn’t feeding.
    Because it has to go through the distortion-pedal which comes AFTER the switch,
    which should be “dead” if the switch is on A.

    June 8, 2011 at 7:49 pm in reply to: Nano Switchblade Channels Mixed?? #115466
    Damage Inc.
    Participant

    I’ll try all that later on.

    But isn’t it clear when I actually HEAR the DM4 (taking the signal from Channel B)
    through the sound of the OTHER signal (fed from/through Channel A) that you hear them not actually separated?
    I mean, it might not be common that you have 2 instrument-inputs on an amp and also both always hot.
    But if you switch between 2 signal-paths on a device, they should definitely be completely isolated from each other.

    I’m also not sure what you mean by if the inputs of the amp are connected.
    All I know is that you can only hear them simultaneously, you can’t turn them off or anything except for the volume.
    But they are parallel because you can turn each down without affecting the other.

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