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This sounds like a cool idea.ClubAndCountry wrote:The simplest way to give two-channel operation would be to switch the master volume out of the circuit in Low dynamic range - which would be relatively easy to do with another relay, since the switching control circuit is there already. That would give you essentially the Low mode with the master all the way up, and the High mode with it set to wherever the knob is.
The volume for controling the two ranges (in the way they were meant to be controlled) is on the guitar.ClubAndCountry wrote:I do actually find it odd that the Vintage Modern was *not* designed with any way of controlling the volumes of the two modes separately, since they are footswitchable and so it *is* intended to be used on the fly... but SteveD presumably has his reasons.
no there not! there is only ONE dynamic range in this amp. the high and low settings are part of the SAME dynamic range.they are just diff extremes of that scale. high and low just determine what scale of guitar volume your at. i.e high range is like rollin the volume up! and low range is like havin the volume from 0-3. but obviously controling it between 0 and 3 is awkward so that scale part of the range is extended to fit the whole volume knob.ClubAndCountry wrote:By the way, why are the modes labeled that way round? The "low" mode is actually *high* dynamic range since it accepts a wide range of signal level and produces a fairly wide range of output level; the "high" mode is actually *low* dynamic range since it takes a wide range of input signal and produces essentially the same output level, just with varying degrees of distortion. They're really High and Low *gain* modes. Or did you want to keep the words "high gain" well away from this amp... :-)
I would quibble with that because the first quote that you used doesn't mention distortion, and it seems to me that in photography for example, if you were talking about dynamic range, you would be including the areas of shadow and highlight where there was still discernible detail.ClubAndCountry wrote:No, there is one type of dynamic range and the Wiki link you posted explains it clearly.
quote: "the ratio of a specified maximum level of a parameter, such as power, current, voltage or frequency, to the minimum detectable value of that parameter."
or: "In a transmission system, the ratio of the overload level (the maximum signal power that the system can tolerate without distortion of the signal) to the noise level of the system."
By either of those requirements, the modes on the Vintage Modern are labeled the wrong way round - the "high" mode has a lot less available range between the level of input signal and the level of output signal than the "low" does, because it goes into distortion a lot sooner.
I'd bet a beer that Steve didn't name that button, some marketing guy did. Marketeers don't care too much about the accuracy of terms they use. There must be a Dilbert cartoon about this somewhere.ClubAndCountry wrote: I'm sure SteveD knows what it really means too, which is why I was joking (but seriously) about not wanting to call the true function of the mode switch low and high *gain*, since that would involve the words "high" and "gain" together on an amp which is designed to be the opposite of what a "high gain" amp has come to mean.
Unfortunately a lot of terms used in guitar amplification are incorrect, and although most people understand what they "do", and sometimes get annoyed with people who insist on using the right terms, naming things wrongly does cause a lot of confusion as to how things operate for people who don't know the proper technical explanation!
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