Nice record, thanks for the recommendation.
Yeah, I hear about three and a half voices too. I've got an old TEAC BX300 amp with the opamps swapped, DIY ES9023, and Triangle Antal speakers.
What, precisely, is "half a voice", and how exactly did you distinguish it from one full voice?
It sounds like a musical interval, very slightly distorted in this case. An interval is two notes rather than one, thus there had to be two voices. The 'half' term was because the vocal notes are supposed to sound like two voices, not one blurred together interval texture, and perceived location in the sound stage was supposed to be different for each voice.
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The stock board does not have a true I/V output stage. (And the analog supplies are noisy.) The stock board schematic (and the terrible implementation) is attached.
So I made a true I/V stage as discussed in the ES9038Q2M board thread. See this post and the "no hump" values: ES9038Q2M Board
Attachments
This was pointed out in detail in the already very old PDF papers in post #82 under
https://www.diyaudio.com/forums/sol...ooks-overview-google-books-9.html#post6707846
Nonsense, you just told that spent some tousands in tubes, and sound was poor, as the guys who know how to evalue the sound does put 10times less money end get remarkable results.
Btw, new opa's is not bad of course.
Btw, new opa's is not bad of course.
True, is that human have the habit to trust what he/she understand him/her self. It means we bind to todays known meaurement equipment, thd imd sn, whatever. But the listening is more important, as all these thd imd sn is just an esiest way to measure what our science succed now. While people binded to that - if not they would force to realise they worth nothing/hang up or something.
Science is depending of objectives and the scope of research, it depends of the open mind of researcher and knowlege of these days. If they found some rules it doesn't mean its absolute. As more we discover as much more left undiscovered. One more habit - leave in comfort zone 🤣.
Another way listen and musical precepcion that is not the science and is subjective for sure, but the subjects with good listenging memory and experience can reach better result than science does.
Also would big confuse base listening experience on professional musicians as they focus is different often. In listening sessions with professional musicians some evaluations was something like "yes this sysyem hits to beat, this also, etc. ". While lot of tallant music bands who we listen to have poor records(sure there goes talk about f.e. 70-90y of past century), also we have some few examples what did well, all of them was professionals.
Science is depending of objectives and the scope of research, it depends of the open mind of researcher and knowlege of these days. If they found some rules it doesn't mean its absolute. As more we discover as much more left undiscovered. One more habit - leave in comfort zone 🤣.
Another way listen and musical precepcion that is not the science and is subjective for sure, but the subjects with good listenging memory and experience can reach better result than science does.
Also would big confuse base listening experience on professional musicians as they focus is different often. In listening sessions with professional musicians some evaluations was something like "yes this sysyem hits to beat, this also, etc. ". While lot of tallant music bands who we listen to have poor records(sure there goes talk about f.e. 70-90y of past century), also we have some few examples what did well, all of them was professionals.
I've come to ask for wisdom! I'm designing a little integrated board for my soon to be cheap DSP project (as a full time hobby, that is.) I'd like to experiment with op amp based differential signal generation. These are the op amps I have:
LM741 (CA741CE):
CA741CE Intersil - Distributors and Price Comparison | Octopart component search
LS141CB:
LS141CB STMicroelectronics - Distributors and Price Comparison | Octopart component search
NE5532P
Texas Instruments MC1458P:
MC1458P Texas Instruments - Amplifiers - Op Amps, Buffer, Instrumentation - Distributors, Price Comparison, and Datasheets | Octopart component search
Which one of these would be my best bet as a starting point? I will be comparing measurements with the classical transformer based differential.
Cheers!
LM741 (CA741CE):
CA741CE Intersil - Distributors and Price Comparison | Octopart component search
LS141CB:
LS141CB STMicroelectronics - Distributors and Price Comparison | Octopart component search
NE5532P
Texas Instruments MC1458P:
MC1458P Texas Instruments - Amplifiers - Op Amps, Buffer, Instrumentation - Distributors, Price Comparison, and Datasheets | Octopart component search
Which one of these would be my best bet as a starting point? I will be comparing measurements with the classical transformer based differential.
Cheers!
Of the four you listed the NE5532 is by far the best op-amp for audio.
There are much better audio op-amps now but the NE5532 was used almost everywhere in pro audio for a very long time.
If you can you might want to try LM4562 or if you don't mind the cost perhaps consider OPA1612 and OPA2228.
There are much better audio op-amps now but the NE5532 was used almost everywhere in pro audio for a very long time.
If you can you might want to try LM4562 or if you don't mind the cost perhaps consider OPA1612 and OPA2228.