Spin Semiconductor

You should put the crystal as close as possible to the chip. Also, it is very important that power bypass caps be directly next to power pins to ensure that the chip is stable during operation. A daughter board sounds like a good idea. If I were you I'd place the bypass caps, input and output filter...

Aha! I had wrongly assumed it had some sort of knee instead of being a hard clamp.

Thanks for your help.

Hi Frank,

Thanks for your help. I think that should help me make this work.

Also, without revealing too many secrets, is it possible to describe a bit about how the saturate/limit module works?


Cheers,

Andrew

I'm trying to better understand the LFOs in the FV-1. Specifically what is happening behind the scenes. Does the SIN LFO get updated every sample? What is the resolution of it? For instance, if I set a very slow speed (0.2Hz or something) will I hear steps or does it calculate a new value for each a...

What I'm trying to do is avoid zipper noise so people can dial through the delay while playing. Is there a proper way to do it? I noticed that the chorus servo method makes the pitch shift up and down slightly. Obviously moving the pointer is going to cause some discontinuity, but what is the least ...

Thanks for the advice... I confirmed that I am in fact using RMP0 for both. But I'm still not able to get it working correctly. For very short delays it seems to work fine, I hear a slight pitch shift as the LFO moves the pointer to the right location. But for longer delays (I'm using the entire del...

I'm particularly interested in the delay servo technique shown on the Coding Examples page of the SpinSemi website. Dialing through different delay settings is really noisy. But perhaps I'm not understanding the example correctly. All the setup instructions use RMP0 and the CHO RDA instructions use ...

Hi Frank, Thanks! Here are the ones that I'd like a bit more clarification as to what the opcodes mean: RDFX WRLX WRHX Also, do you have a formula for how to calculate the speed of the ramp generator? The AN-001 talks about how to set the speed of the sin LFO, but can't find anything on how to do th...

I'm working on a different sort of compiler for the FV-1 since I want something different and want to integrate it with my own EEPROM programmer. (it will be open-source too) In my effort to un-assembler the syntax, I want to use longer names for the instructions. But I'm not sure what all the short...

Hi Frank,

Thanks for the response. I am expecting my PCB to come in this week for my application circuit so I will be making tests with it. I'm hoping that a tighter layout combined with a shielded enclosure will help.

Cheers!

Hi, I've been working towards an effects product based on the FV-1 but am having some problems with output noise. The datasheet talks about out of band noise, but I'm hearing quite a lot of in-band hiss with the development board. It's much lower when I power the circuit from my own PSU and not from...

So far I'm loving the FV-1 and working on several designs with it! But one thing that bugs me is that the pot inputs feel sluggish. It doesn't seem to track the turning of the physical pot and sort of plays catch up when you stop turning. I often find that once things settle down I've actually over-...

Hi. I've started to think about reverb a lot since learning how to make it in the FV-1. Although it is very subjective, I'm trying to figure out a way to quantify what I'm hearing at least for comparison purposes. I'm wondering if anyone knows techniques for analyzing reverb sounds? I started to wri...

Hey,

Is it possible to assemble code and write the EEPROM on the FV-1 development board by using the command line? I'd like to make scripts that don't require interaction with the IDE for these steps, as well as catching error output from the assembler.

Hey Frank, Thanks for the info. I was just wondering the capabilities. In my current project idea I'm only using one ADC. Is it possible to use the second channel to read DC values, for instance if I wanted 4 pots, or an extra input for a switch? I would assume it would just read a DC value between ...