Search found 15 matches

by bdoan
Sun Dec 23, 2018 6:49 pm
Forum: FV-1 software questions
Topic: Dual mono effect
Replies: 1
Views: 3382

Dual mono effect

How would I modify this program to have -Echo on the left channel only and -Reverb on the right channel only ;ECHO+REVERB. ;Pot0 = delay 100-500ms. ;Pot1 = repeat ;Pot2 = reverb (fixed parameters) mem del 22938 mem ap1 123 mem ap2 245 mem ap3 625 mem ap4 856 mem lap1a 974 mem lap1b 1437 mem d1 1523...
by bdoan
Sat Feb 17, 2018 2:52 pm
Forum: FV-1 hardware questions
Topic: FV-1 startup
Replies: 1
Views: 3581

FV-1 startup

Is there any specification (or real world data) on how long (after Vdd goes high) it takes for the FV-1 to load external EEPROM data?

I have other devices on the I2C bus.

How long before "the coast is clear"?
by bdoan
Sat Jun 06, 2015 9:26 pm
Forum: FV-1 hardware questions
Topic: Partitioning power supply
Replies: 2
Views: 4914

Partitioning power supply

I need to delay the startup of the FV-1 until other portions of the circuit are initialized so as to keep supply current low.

Is there a way to keep the FV-1 from drawing current (without removing Vcc)?
by bdoan
Mon May 25, 2015 3:59 pm
Forum: FV-1 hardware questions
Topic: Headroom
Replies: 5
Views: 7155

So if I run an analog limiter to protect the input of the FV-1, and I limit to 3Vp-p, can I ignore the 6db headroom rule?
by bdoan
Tue May 19, 2015 6:16 am
Forum: FV-1 hardware questions
Topic: Headroom
Replies: 5
Views: 7155

Can you recommend any analog compressor/limiter circuits that will work from a single 3.3v supply?
by bdoan
Mon May 18, 2015 10:08 pm
Forum: FV-1 hardware questions
Topic: Headroom
Replies: 5
Views: 7155

Headroom

How much headroom do you suggest for the FV-1?

What p-p input value will clip the ADC?

What sort of gain (loss) do you expect from most effect patches?
by bdoan
Sat Mar 07, 2015 2:57 pm
Forum: Algorithm development
Topic: Variable notch filter
Replies: 0
Views: 29772

Variable notch filter

RE: http://www.spinsemi.com/forum/viewtopic.php?t=82 I have pared this code down and still have a useable, tunable notch. What I need to figure is the relation between the POT value (for frequency) and the actual notch frequency. ;Frequency control rdax pot0,1 ;get freq control rdfx p0fil,0.01 ;aver...
by bdoan
Wed Feb 25, 2015 9:15 pm
Forum: FV-1 software questions
Topic: EEPROM address boundaries
Replies: 1
Views: 3895

EEPROM address boundaries

What are the address boundaries for each effects patch?

I notice that most patches seem to leave some "blank space" (hex 00s).

The spaces seem to be 0x200 long.

Is this true?
by bdoan
Sat Feb 21, 2015 6:14 am
Forum: FV-1 hardware questions
Topic: EEPROM read timing
Replies: 1
Views: 4424

EEPROM read timing

How quickly can you update a patch from external EEPROM?

How long does it take for the FV-1 to recognize that S0,S1,S2 have changed?
by bdoan
Wed Jan 21, 2015 9:10 am
Forum: FV-1 hardware questions
Topic: Cascade Left and Right Channels
Replies: 4
Views: 6601

Cascade Left and Right Channels

Is it necessary to include the low pass filter components when feeding left channel output to the right channel input of the FV-1?
by bdoan
Mon Jan 05, 2015 10:31 am
Forum: FV-1 hardware questions
Topic: Additional Parameters
Replies: 4
Views: 14311

modify specific EEPROM locations

I am fine with having the FV1 reload (under MPU direction)

Is there a way to disassemble the EEPROM code or otherwise know what location contains the value of any specific parameter (ie: delay time)
by bdoan
Sat Jan 03, 2015 6:22 pm
Forum: FV-1 hardware questions
Topic: Additional Parameters
Replies: 4
Views: 14311

Additional Parameters

Is it possible to modify specific locations in external EEPROM to adjust additional parameters (ie: notch filter center frequency)?
by bdoan
Mon Apr 07, 2014 2:49 pm
Forum: FV-1 hardware questions
Topic: Clip LED
Replies: 3
Views: 8445

Clip LED

Is it active high or pull-down?
by bdoan
Mon Apr 07, 2014 1:04 pm
Forum: FV-1 software questions
Topic: Using PWM output of uP to drive pot inputs
Replies: 1
Views: 5036

Using PWM output of uP to drive pot inputs

With a simple RC filter on a PWM output from a uP, will the FV-1 accept the DC with ripple input?
by bdoan
Mon Mar 17, 2014 7:18 am
Forum: FV-1 software questions
Topic: Separate control of Left and Right
Replies: 1
Views: 4466

Separate control of Left and Right

Is there any way to separately control the parameters of the left and right DSP channels?