Spin Semiconductor

Freaked me out there, thought there was a bug in that SpinCAD block but I checked the source and I don't think so - don't see LDAX in there and I've used the crossfade block a fair amount.

Using the "Minimum Reverb" block will have some tradeoffs as this algorithm is about the fewest lines of code that sounds anything close to a reverb. SpinCAD is not designed to fine tune reverbs unfortunately. If you really want to give that a go, it's best to just work directly in Spin AS...

You might be interested in this - http://gbiswell.myzen.co.uk/Dervish_intro.html

Nice program! I tried it yesterday and I was very pleased. I will probably customize it to my needs in terms of presets. Can I ask how did you calculate the coefficients for the different intervals? Is there a standard formula for it? Mat http://www.spinsemi.com/forum/viewtopic.php?t=114&highli...

If your effects are mostly of the ambience type (delays and reverbs) then I think the additional latency will not be a big deal. A chorus also might not be too greatly affected by the latency as your wet signal is already going to be delayed some tens of milliseconds. For a flanger, you might want t...

You can delete these references as well: equ lp1 reg1 equ lp2 reg2 wrax lp1,0 wrax lp2,0 lp1 and lp2 are never used beyond being cleared to zero at init time. Call me crazy but I generally skip clearing my filter registers at init time. I suppose it might cause a pop under some circumstances but I d...

Thanks, Ice-9, I'm looking for an approach that will work whether the input is 5V or 3.3V. Would the level shifters do that?

I appreciate the insight, Admiral_dk. These are BZX84s. I do need to protect against 5 volts, even though on the pedal I got from Mr. Ice-9, my 5 volt only PICKit-2 clone does not blow up the FV-1, I don't feel comfortable continuing without a voltage clamp. I'll give the ones you recommended a shot...

So is 10 uA reverse leakage through the zeners enough to pull those down by 1.3 volts and prevent reading of the EEPROM from working? It's probably fine to leave the zeners off, I'm just trying to understand what happened here.

I pulled the zeners off and... it's ALIVVVEEEEEE moo0000oooowahahahahahahah!!! :D The specs say they could have 10 uA reverse current. As this i2c bus is lacking pullups, there's no specific control over the idle voltage if something else is leaking current. Now to see if I can still program the EEP...

Thanks guys. I have not gone fully though this, however: a) Internal programs pass signal. I'm just looking at a scope trace using a sine wave input. b) Same EEPROM does not make clipping light come on with FV-1 dev board. c) what you DIDN'T know is that I have serial 1k/3.3V zeners attached to limi...

Finally designed a PCB. Getting 32 kHz on both crystal pins and activity on SDA and SCL when I flip the program select pins around. I believe that I programmed the chip successfully with my PICKit2. I did use socketed DIP EEPROM so I could swap it into Spin dev board to be sure. I'm seeing a signal ...

For my style of playing, the ideal delay length would be one that allows me to complete my performance and leave the venue before anyone hears it!

I'm not making fun of you. I'm suggesting that you can test your ideas easily by trying them and this is a great way to learn. Just make sure you aren't wearing headphones when you do it, because you never know what might happen. I am fairly sure what you mentioned would work, although I didn't look...

Give it a shot and see what happens.