Search found 13 matches

by skajam66
Mon Nov 13, 2017 6:55 pm
Forum: FV-1 software questions
Topic: Phase difference between wet&dry signals
Replies: 2
Views: 4280

Phase difference between wet&dry signals

HI, I'm looking at using the FV-1 in a design where the FV-1 acts as a send/receive FX block. There is an analog channel which must remain untouched - the FV-1 would be fed from the analog channel and a % mixed back in late in the analog chain. Should I be concerned about the phase difference betwee...
by skajam66
Wed May 17, 2017 9:18 pm
Forum: FV-1 hardware questions
Topic: FV-1 - Unused input
Replies: 1
Views: 3546

FV-1 - Unused input

I have seen other questions on this topic and the recommendation for mono designs is to drive both right and left inputs... However, is there any power saving that can be accrued if, instead, one input is coupled to ground via a capacitor of, say, 1uF? The corresponding output would be left floating...
by skajam66
Wed May 17, 2017 9:10 pm
Forum: FV-1 hardware questions
Topic: FV-1 Dev Board - external EEPROM
Replies: 1
Views: 3695

FV-1 Dev Board - external EEPROM

With reference to the FV-1 Dev Board schematic:

1) Can the EEPROM I2C address be changed? If so, how?

2) What is the layout of the EEPROM as it pertains to the stored programs? If I want to replace program N, what address do I start writing from?
by skajam66
Wed May 17, 2017 9:03 pm
Forum: FV-1 hardware questions
Topic: FV-1 Dev Board MID decoupling capcitor
Replies: 1
Views: 3466

FV-1 Dev Board MID decoupling capcitor

With reference to the FV-1 dev board schematic, C22 is a 10uF tantalum capacitor. As this is decoupling the internal VDD/2 power rail, can it be replaced with a 10uF 50V X7R ceramic?
by skajam66
Wed May 17, 2017 8:58 pm
Forum: FV-1 hardware questions
Topic: FV-1 Dev Board - Output resistors and capacitors
Replies: 1
Views: 3553

FV-1 Dev Board - Output resistors and capacitors

With reference to the FV-1 Dev Board schematic, what is the purpose of resistors R7, R8? Are they to allow the output capacitors to charge during power up when there is nothing physically connected to the output connectors? If yes, can they be removed for designs where the output feeds other interna...
by skajam66
Wed May 17, 2017 8:49 pm
Forum: FV-1 hardware questions
Topic: FV-1 Dev Board - input capcitors
Replies: 1
Views: 3464

FV-1 Dev Board - input capcitors

With reference to the FV-1 Dev Board schematic and tantalum capacitors C15, C31: 1. Can these capacitors be replaced with film capacitors? I.e. is there anything that specifically requires them to be tantalum dielectric? 2. Can the value be reduced to 0.47uF? Given and input impedance of between 80k...
by skajam66
Wed May 17, 2017 8:39 pm
Forum: FV-1 hardware questions
Topic: FV-1 Dev Board - 30k input resistors
Replies: 1
Views: 3394

FV-1 Dev Board - 30k input resistors

Referring to the FV-1 Dev board schematic, what is the purpose of the 30k input resistors R3, R4? Can they be omitted for designs where the input is fed from other internal circuitry as opposed to the outside world?
by skajam66
Sun Apr 02, 2017 8:42 am
Forum: FV-1 hardware questions
Topic: NAMM 2017
Replies: 41
Views: 64355

Hi,

For the new chip, do you have a target for power consumption?

Ac
by skajam66
Sat Apr 01, 2017 7:22 pm
Forum: FV-1 hardware questions
Topic: Digital potentiometers/DAC
Replies: 1
Views: 3645

Digital potentiometers/DAC

A couple of questions: 1. Does anyone have any experience that they can share driving the FV-1 pot inputs using digital potentiometers or DACs? Is there a recommended method? 2. Is the internal 9-bit quantisation of the pot inputs a simple Vdd/512 formula (with hysteresis around these values)? Regar...
by skajam66
Fri Mar 17, 2017 6:24 am
Forum: FV-1 hardware questions
Topic: FV-1 power consumption
Replies: 0
Views: 27013

FV-1 power consumption

The data sheet says 50mA typ, 70mA max. Does anyone have any insights into how to keep current draw to an absolute minimum?
by skajam66
Sat Aug 10, 2013 1:40 am
Forum: FV-1 software questions
Topic: Pitch detection
Replies: 4
Views: 7929

I've now read the quoted thread (should have done this before I replied) and it looks like the comments by Don Stavely have exactly what I'm looking for.
by skajam66
Sat Aug 10, 2013 1:26 am
Forum: FV-1 software questions
Topic: Pitch detection
Replies: 4
Views: 7929

Thanks for your replies. To elaborate, I have a guitar amp that I'm looking to add the FV-1 circuitry for effects and it struck me that a built-in tuner would also be a nice option particularly if the FV-1 could perform that task as well. The FV-1 would need to be able to provide some output that wo...
by skajam66
Wed Jul 24, 2013 8:48 pm
Forum: FV-1 software questions
Topic: Pitch detection
Replies: 4
Views: 7929

Pitch detection

Is there any way to use the FV-1 chip to perform pitch detection?