Title says it all..
I have an existing, working board already.
(its more or less a hybrid, all-in-one, Arduino and Waveshield in one small SMT board)
The board works as intended.. however I plan to get some of these assembled by a 3rd party (so I dont have to assemble by hand and re-flow in a toaster oven any more) to get some large batches made, and I want to improve on the quality of the audio output.
Here is some background where I tried to learn/play with LTSpice to adjust the hi/lo pass filters.
http://forum.arduino.cc/index.php?topic=373870.0
LTSpice just made things more confusing for me.. and in the end not much better than what I started out with.
So I am looking for some help/guidance to make my current hi/lo pass filters BETTER to improve quality than what I am getting now. (It needs to be able to play a range of audio from hi's to low's without hiss/pop..etc) ** I have some sample .wav files if needed for testing)
The board can/will not be changed.. it is what it is. (So suggestions/solutions of change this to that that requires a new PCB or large change isnt going to be entertained)..
The pcb/schematic that pertains to the project in posted above in the other thread...
Its basically:
Low-Pass Filter:
R8 =
C18 =
Voltage Divider:
R5 =
R6 =
High-Pass Filter:
C21 =
these values that I am looking for BETTER QUALITY/performance than I am currently getting.
If you look at the other thread.. you will see (read) that I have a DEMO board set up.. with little female headers come from the pads. This is so I can 'plug-in' different combinations of values and test the results.
This is what I will do for your suggested answer/values as well.. if it works out and sounds great.. you get the loot!
I know its on the small side of projects, but I do believe in paying for the help regardless (for time and effort at least).. **(IF THE SUGGESTIONS MAKE THINGS SOUND BETTER)
I'm posting in the paying gigs because:
1.) I am bit turned off by LTSPice, and using it as a tool for helping me achieve my goal here
2.) I want to send out to get a batch of these made by some 3rd party Chinese assembly shop, so dont want to have to 'fix' anything after the fact.
3.) Paying so its someone else responsibility for the hi/lo stuff! haha
Let me know if you are interested. (PM or post here with questions/interst)
thanks!
-xl