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Post by JohnH on Mar 26, 2018 14:15:23 GMT -5
Probably it will work but I dont know how ii will sohnd or what other issues may be caused. Your certainly right about that. I have found this bf245 loaded eq circuit. What do you think? Interesting - in some ways its not much different to mine, with more bands. It has gain/buffer, passive tone shaping , then more gain. The main risk I see is that you feed in a reasonably strong signal, and it gets boosted and clips by the first transistor before going through the network. It is also likely that each band, being controlled by a very simple RC network, will be quite spread out, overlapping to some extent. But I think it is interesting enough to mock it up in a simulator program like LTSpice or 5Spice. If it does a useful amount of tone control, then other problems could be fixed.
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bwps
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Post by bwps on Mar 26, 2018 18:11:57 GMT -5
Your certainly right about that. I have found this bf245 loaded eq circuit. What do you think? Interesting - in some ways its not much different to mine, with more bands. It has gain/buffer, passive tone shaping , then more gain. The main risk I see is that you feed in a reasonably strong signal, and it gets boosted and clips by the first transistor before going through the network. It is also likely that each band, being controlled by a very simple RC network, will be quite spread out, overlapping to some extent. But I think it is interesting enough to mock it up in a simulator program like LTSpice or 5Spice. If it does a useful amount of tone control, then other problems could be fixed. Ill take my chances with that first. It holds many similarities To yours. In addition, we are spotting The most important frequencies from an acoustic-guitar audio file and get it stuck into The circuit. The thing is: how can we know The frequencies we want - air resonance, some mid range ones for instance - are exactly those we identify? Suggestions? If if we make some money on it, I promise Ill remember you.
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Post by JohnH on Mar 26, 2018 19:32:04 GMT -5
You could test like I did, recording some samples into a pc using Audacity. Then compare the frequency plots to those from other known guitars that you can get hold of. Then you can work out what kind of tonal sculpting you need. Start by experimenting with the graphical EQ in the software, then when you have a profile, design a circuit to achieve that.
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bwps
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Post by bwps on Mar 26, 2018 21:13:49 GMT -5
You could test like I did, recording some samples into a pc using Audacity. Then compare the frequency plots to those from other known guitars that you can get hold of. Then you can work out what kind of tonal sculpting you need. Start by experimenting with the graphical EQ in the software, then when you have a profile, design a circuit to achieve that. That is totally right, but not What I meant. The thing is: how can I tell The frequency I so desire is The 87hz, for example? The graphic in The software will perfectly and exactly point out The frequencies from The audio files, but how do I match what I listen To To what is on The screen?
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