Community: Message List

Re: Simple Multiplication Question

support@line6.com — Sat, 09 Feb 2013 21:35:00 GMT

Thanks for your response. I think my problem is that I dont have a very good grasp on the numbering format, but your explaination helps. From what you are saying, I'm assuming that the numbers are always in the range of -1 to 1.

Here is the code that I was using for the timer: https://www.dropbox.com/s/pdkfejzshz8bki9/Tutorial%2004%20-%20Timer.asm

I have been posting some beginner tutorials at Freestompboxes.org to hopefully get some more interest with this pedal. I just hope Im not explaining everything wrong. lol At least it will give people a starting point with some really simple programs.

Anyways, the code in that link just has the timer set up. I basically start off with a counter value and decrement that on every interupt until the value is equal to 0. Then I flip the bit I was talking about in my previous post and reset the counter value and the cycle continues all over again. If I understood your post correctly, couldn't I just flip a different bit to achieve a value of 1? Thus making the multiplying the signal by the flag value a viable option?

Is there a good tutorial for the fractional numberin format that I could read up on? I feel like this is the area that is really holding me back from making more complex programs.

Simple Multiplication Question

support@line6.com — Thu, 07 Feb 2013 18:58:13 GMT

So I have been struggling with figuring out how to do some simple multiplication on my ToneCore DSP. I have written a timer that basically flips a single bit on a "flag" so that I either have a 1 or a 0. This is the 0th bit in the register so I assume that the number in decimal is 1 or 0. Am I wrong?

So the timer works fine. But where I run into trouble is when I try to multiply my flag times the current sample. I would think that I would either have a muted signal or the original signal depending on the state of the flag, but I listen to the output I am getting nothing out. When I output the sample to the screen (after the multiplication) it seems to either be FFFFFF or 000000 but that value doesn't coincide with the value of the flag at all (which I am also outputting to the screen).

I could make this program so that it branched and either did nothing to the sample or wrote 0’s over it depending on the value of the flag bit, but that seems like it’s incredibly inefficient compared to just multiplying it. Any thoughts?

Re: Tutorials and examples?

support@line6.com — Sun, 02 Dec 2012 06:19:17 GMT

Wow. Glad I logged in here. I check this forum about once every 6 months or so...

I asked a similar question a long time ago and people basically said "No." There isn't much help out there on the internet for this one. So as I have been learning (very slow process) I have been making some really basic tutorials and posting them on Freestompboxes.org under their DSP section.

Here is the first thread I started: http://freestompboxes.org/viewtopic.php?f=29&t=15620. It is basically a list of helpful documents and tutorials that I have found on the net since I started. Some of them were extremely helpful to me!

Then I made 3 short tutorials:

1. http://freestompboxes.org/viewtopic.php?f=29&t=19360

2. http://freestompboxes.org/viewtopic.php?f=29&t=19381

3. http://freestompboxes.org/viewtopic.php?f=29&t=19610

Hopefully these are helpful to you or anyone else who comes across them. I am working on a 4th tutorial, but my pedal seems to have malfunctioned today. So I'll have to look into it more when I have some time. If you have any questions, please post them over at Freestompboxes.org as I don't come here very often, but I check that forum on a fairly regular basis. Also, I am not very experienced at this so I might not be too helpful at answering questions, but I'll try my best.

Best of luck!

Note: all of my tutorials are in Assembly because everyone on the net says that's the way to go. Its not as hard as it seems. You will just have to put some time into it.

Re: Simple Tutorial?

support@line6.com — Fri, 13 Apr 2012 19:52:42 GMT

Thanks for all the advice! I successfully made a mute pedal last night. I couldn't figure out the mpy command the way I wanted to use it so I used the mov command instead to make the signal 0. This weekend I'll hopefully get a chance to try my hand at a simple volume pedal. Thanks again!

Also, could someone tell me what registers we have available? Sorry for the total noob question. I think I will start making a tutorial to help other complete beginners out and help concrete my thoughts.

Re: Status of this product

support@line6.com — Wed, 11 Apr 2012 22:14:34 GMT

I would love to see some pics and more info about making your own dock. I already bought a dock, but it may help others to get into this. My email is cheezor@mail.com if you want to post them here or send them directly to my email, either way, it would be awesome! Thanks!

Simple Tutorial?

support@line6.com — Wed, 11 Apr 2012 22:06:11 GMT

I have owned one of these things for a while and I would really love to get into programming it. Assembly does not really scare me. However, it is a bit over whelming to try to read through the complete effects that I have seen posted online. Are there any beginners tutorials? Something that starts off super basic, like a volume pedal, mute pedal, or something similar, but explains most or all of the code for beginners like myself. I have walked myself through some of the source out there and I understand parts of it, but not enough to make something simple like I just said.

It seems like a mute pedal could be easily changed to a volume pedal and from there changed into a stutter effect and that would show all the beginners how to work with volume, knobs, and timing. If someone would be interested in making a tutorial or point me to some info like this that would be awesome! Basically, what I want is a "Hello World!" program to get me started. Any help would be appreciated. Thanks!