This goes back a way, but here's an interesting interview with pianist Jeremy Denk, describing his journey with Ligeti on Fresh Air with Terry Gross.
For me, I think I'll watch 2001 tonight.
Combination of near field listening and headphones.
MySphere 3 Headphones | highend-electronics, inc.
Nowadays the concept has been turned inside-out - they're putting the room right in your 'phones. (I'd love to hear this thing.)
We did it together IIRC at SY's place. The effect is fairly amazing.
@Ed That looks like a digital version of a conventional spectrum analyzer. Software radio does this, Digital down conversion in software radio terminals - IEEE Conference Publication
Last edited:
It is, just another method to provide a different view and error process.
Aside from using two instruments you can get similar from i.e. Virtins, where you get waveform and spectrum. Picoscope's software also can do this. There is a major conflict in waveform resolution (small time slice) and frequency resolution, which needs a long sample to get fine resolution, also making the exact time of a specific frequency hard to determine.
The digital down conversion works just like a single conversion spectrum analyzer, in their example 900MHz is mixed down to 0 and you can observe 100kHz BW at 100Hz resolution with only just over 2K samples. A typical analog spectrum analyzer uses multiple conversions because it is very difficult to make a good LO with a huge sweep range. I don't think picoscope or Virtins is capable of this, but I don't know.
Last edited:
Combination of near field listening and headphones.
MySphere 3 Headphones | highend-electronics, inc.
Weird but maybe?
BTW -- your stereo amp design has now morphed into a Class A mono block with 24 IRF devices. Still very low thd at any freq and power and Z.
THx-RNMarsh
Weird but maybe?
BTW -- your stereo amp design has now morphed into a Class A mono block with 24 IRF devices. Still very low thd at any freq and power and Z.
THx-RNMarsh
Could you give more information about changes and final result?
PS. If don't want to do that here send me PM.
BR Damir
Interesting article and amazing to read that technology has progressed that far that 440Mhz AD converters are within reach.
It seems only a small step to do the first heterodyne step of BPF, LNA and mixer also digitally.
That would make good FM probably superior to DAB with their low bitrates.
Hans
It’s already out Hans since more than 10 years (thanks to digital TV)
I am a dump user of this technology (UHF reception).
If someone is up to programing (got 'Python'
Scott? ) he can do wonders with $20 hardware.http://www.eas.uccs.edu/~mwickert/ece4670/lecture_notes/Lab6.pdf
ピンクの像 DVB-T DAB+FMの回路図を想象する RTL2832U R820T: 閑人
George
Attachments
I can only say WOW !!It’s already out Hans since more than 10 years (thanks to digital TV)
I am a dump user of this technology (UHF reception).
If someone is up to programing (got 'Python'
George
Hans