dmlandrum said:Now, back to the actual discussion at hand: FPGA, or micro with controller chip? I think I'm still leaning toward the latter.
dmlandrum said:(But really, M-Audio? You're still charging $600 for a 15-year-old design? Sheesh.)
dmlandrum said:Based upon what I remember from my sysadmin days and what I'm gathering from earlier in this thread, the hardware part of Ethernet is little more than a very fast serial port, right? Which means that we'd just be bit-banging the output and then reading it in at the input. The cables also have separate twisted pairs for transmitting and receiving, so I'm guessing it's probably asynchronous as well.
Please hit me with any thoughts and corrections.
dmlandrum said:To me, FPGAs are best for 1) niche designs that can't justify mask costs and 2) lower-level designs that benefit from being highly customized, and 3) where field programmability is a must. (When I say "lower level", I'm referring to complexity, for lack of a better word.) None of that really fits here.
dmlandrum said:Do we really need to implement a full TCP/IP stack? Or can we just treat the Ethernet controller as a super-fast serial port?
Those APM chips look pretty good. Are they all BGA packages? A quick glance doesn't really say.
dmlandrum said:I'm going to bow out of this for now. I won't be able to accomplish anything until I have some sort of income, anyway. So I'm going to stop talking about until I can actually make something.
jollydowsen said:dmlandrum said:I'm going to bow out of this for now. I won't be able to accomplish anything until I have some sort of income, anyway. So I'm going to stop talking about until I can actually make something.
well said dmlandrum . until and unless you actually implement your project all talks have no significance.
gemini86 said:jollydowsen said:well said dmlandrum . until and unless you actually implement your project all talks have no significance.
I'm not sure I'm understanding your statement correctly. Are we to stop discussing circuits or audio solutions if we have no intent and/or means to pursue them to full realization?
ricardo said:Has anyone built and tested these PCBs & circuits?
In every case, the performance of ADCs & DACs is dependent NOT on the Golden Pinnae bits or even the chipset. It is critically down to the PCB layout, connections & housing. OK, the surrounding circuitry too but the former are AT LEAST as important.
Here's a DAC example by a guru. http://nwavguy.blogspot.com.au/2012/04/odac-released.html Even he took 4 PCB iterations to approach the datasheet spec.
IMHO, an ADC is more difficult to get right.
ricardo said:Here's a DAC example by a guru. http://nwavguy.blogspot.com.au/2012/04/odac-released.html Even he took 4 PCB iterations to approach the datasheet spec.
Wanna post test results for your DAC or ADC? RMAA will do if you can post a little extra data to determine where is FS.Andy Peters said:"Extremely tiny 0603 ..."ricardo said:
"fine-pitch 48-pin IC ..."
oooooOhhhhh SCARY!!!!
OK, I've stopped laughing.
Enter your email address to join: