Search found 15 matches
- Sun Oct 16, 2022 12:56 am
- Forum: FV-1 hardware questions
- Topic: REG flag in CHO Instructions
- Replies: 3
- Views: 4641
Re: REG flag in CHO Instructions
Ah, that clarifies it, thank you. I'm guessing that applies to CHO RDA and CHO SOF, but CHO RDAL simply gives the live value all the time regardless?
- Thu Oct 13, 2022 7:49 pm
- Forum: FV-1 hardware questions
- Topic: REG flag in CHO Instructions
- Replies: 3
- Views: 4641
REG flag in CHO Instructions
Hi Frank, I'm trying to figure out when the CHO instructions stop using the internal register (REG flag) and revert to using the "live" LFO value. Application note AN-0001 (page 4) shows that once the REG flag is used, several subsequent CHO instructions continue to use the captured LFO va...
- Tue Apr 21, 2020 4:07 pm
- Forum: FV-1 software questions
- Topic: JAM
- Replies: 4
- Views: 6751
Re: JAM
Thank you gentlemen
The latest download SpinSetup_1_1_31.exe (Ver 1.1.31.0) works.
The latest download SpinSetup_1_1_31.exe (Ver 1.1.31.0) works.
- Mon Apr 20, 2020 3:21 pm
- Forum: FV-1 software questions
- Topic: JAM
- Replies: 4
- Views: 6751
Re: JAM
Upon further investigation it seems that the compiler (at least my version of it: 1.0.1.2 - 13/11/2007) doesn't encode the JAM lfo number correctly. It encodes 53h for lfo 2 (RMP0) and encodes 73h for lfo 3 (RMP1), and it only accepts values 2 and 3 as valid. It should encode 2->93h and 3->D3h respe...
- Mon Apr 20, 2020 4:13 am
- Forum: FV-1 software questions
- Topic: JAM
- Replies: 4
- Views: 6751
JAM
I'm trying to figure out what value JAM makes the ramp LFO restart at (high or low), and if it differs between forward ramp to reverse ramp. I wrote the following code to test both ways using POT0 to set the ramp direction, but the ramp doesn't seem to "jam"... skp RUN, START wldr 1, 0, 40...
- Sat Apr 11, 2020 3:00 am
- Forum: FV-1 software questions
- Topic: PACC clarification
- Replies: 5
- Views: 10560
Re: PACC clarification
Does the SKP instruction affect PACC? Or is it only ACC-changing functions that affect PACC?
- Tue May 07, 2019 5:32 pm
- Forum: FV-1 hardware questions
- Topic: Application Note AN-0001 conflict
- Replies: 2
- Views: 4422
Application Note AN-0001 conflict
I just want to clarify a conflict in the application Note AN-0001 regarding SINx_RATE. On page 4 at the bottom it states that "Kf(decimal) = Kf/512", but then on page 5 paragraph 3 it says "Kf(decimal) = (125/511) to (500/511)..." implying that Kf(decimal) = Kf/511. Page 4's form...
- Wed Aug 08, 2018 9:30 pm
- Forum: Algorithm development
- Topic: Digital allpass translation to analog allpass
- Replies: 1
- Views: 2424
Digital allpass translation to analog allpass
I'm trying to understand how the FV-1 allpass filter (RDA & WRAP) translates to an analog allpass filter and vice-versa. For an analog allpass (first-order): 90-degree phase shift happens at fc = 1/(2piRC). Does the RDA/WRAP coef (kap/-kap) relate to fc in the same way as it does with RDFX: fc =...
- Tue Jun 25, 2013 6:48 pm
- Forum: FV-1 software questions
- Topic: Memory declarations?
- Replies: 3
- Views: 6466
Memory address down-counter
My question is about the down-counter address offset used to effectively 'shift' samples through a memory buffer: The way I understand it, there is an address offset in the background which gets added to all read and write operations to SRAM, and automatically decrements for each sample cycle. Would...
- Sat Jun 08, 2013 9:19 pm
- Forum: FV-1 software questions
- Topic: Need for WLDS / WLDR ?
- Replies: 15
- Views: 19205
Ka
Ahhhh....I understand. That makes perfect sense now. Sorry it took half a dozen posts & replies! Thanks for your patience.
Mike.
Mike.
- Thu Jun 06, 2013 3:52 am
- Forum: FV-1 software questions
- Topic: Need for WLDS / WLDR ?
- Replies: 15
- Views: 19205
SIN0 Ka
So for WLDS (Page 3)… Ka = 2 * buffersize And for WRAX (Page 5)… Ka(decimal) = buffersize/32768 Only problem is, when you use the formula on page 4/5 to convert Ka for WLDS to Ka(decimal) for WRAX you end up with... Ka / 32768 = Ka(decimal) Which gives... (2*buffersize)/32768 = buffersize/32768 ...
- Wed Jun 05, 2013 4:31 am
- Forum: FV-1 software questions
- Topic: Need for WLDS / WLDR ?
- Replies: 15
- Views: 19205
SIN0 Ka
Great, that explains CHO RDAL for ramp thanks! However, you didn't really answer my question about the conflict in the app note... Page 3: setting via WLDS suggests Ka = 2 * buffersize (approx)... delay1 mem 8193 ;+/-4096 ... wlds SIN0, 5, 16384 ;2 x mem alloc Page 5: setting via WRAX to RMP0_RATE s...
- Tue Jun 04, 2013 3:34 am
- Forum: FV-1 software questions
- Topic: Need for WLDS / WLDR ?
- Replies: 15
- Views: 19205
CHO RDAL for ramp, WLDS Ka clarification
Ahhhh....that explains the pot range problem all right! Thanks for clearing that up for me. As far as setting the ramp rate via RMP0_RATE...I'm more interested in what CHO RDAL returns for RMP0, which I assumed would have the same amplitude as what you would pass to RMP0_RATE? I'm also still confuse...
- Sat Jun 01, 2013 4:26 am
- Forum: FV-1 software questions
- Topic: Need for WLDS / WLDR ?
- Replies: 15
- Views: 19205
WLDR Amplitude Coef / RMP0_RANGE comparison
Thanks for clarifying...it is possible that my pot was responsible for this as I use 3.0V for my pot supplies instead of 3.3V, therefore my RAMP_RATE may have been 9% lower than what I was expecting. (Although having said that, REFP is also fed 3.0V so I would have thought they would scale fully). M...
- Sun May 19, 2013 7:13 pm
- Forum: FV-1 software questions
- Topic: Need for WLDS / WLDR ?
- Replies: 15
- Views: 19205
WLDR ... correlation between WLDR coef and RMPn_RATE decimal
Hi Frank, I'm new to FV-1 and loving the capabilities! However, there is a piece of info I seem to be having trouble finding or wrapping my head around, and it's to do with the correlation between WLDR freq coef and RMP0_RATE freq (fractional) value. You can set up ramp speed using WLDR with a binar...