===================================================
= NB: Over 50% of this message is QUOTED, please =
= be more selective when quoting text =
===================================================
Thank you, Jonathan.
| So, I tried increasing the tone frequency. Here are the results (all
| done using short ten-second recordings) :
|
| Frequency/Hz | Number of level meter bars below 0dB
| ---------------------------------------------------
| 250 | 0
| 1000 | 0
| 2000 | 0
| 3000 | 0
| 4000 | 0
| 5000 | 1
| 6000 | 1
| 7000 | 1
| 8000 | 2
| 9000 | 2
| 10000 | 2
| 11000 | 2
| 12000 | 3
| 13000 | 3
| 14000 | 4
| 15000 | 5
| 16000 | 6
| 17000 | 7
| 18000 | 7
| 18500 | 8
| 19000 | 9
| 20000 | 10
|
| Note: The level meter scale is *not* linear
|
| For reference the meter has 18 bars from "negative infinity" to 0dB on
| each channel (plus one larger one for 'over'). The numbers in the table
| are the number of unlit bars from and including the 0dB bar (the 'over'
| bar didn't light up at any time).
And a volume of -1.2 dB will still light up the last bar, I believe.
| I thought that this frequency response may be due to the MD's ATRAC so I
| reran the entire test with stereo recording. The meter remained on 0dB.
| No noticeable volume loss occured even at 20kHz.
Thank you so much. Checking at various pitches was inspired, Jonathan.
| Conclusion:
|
| The volume loss appears to be frequency-dependant, as the frequency
| increases, so does the loss in volume.
| Due to the amount of home-made hardware involved I think it would probably
| be best if somebody else (David?) tries this as well (using a different
| tone generation program) to see if we can get similar results, before we
| start to draw any real conclusions / blame Sony.
All right; where do I get a different tone generating program? It can write
.wavs, right? Then I could copy those to CDRW (on the computer's burner, not
on the standalone, since my soundcard has only analog ports) and record them
to MD, then back to CDRW on the standalone, then rip them to the computer
again for analysis ... aw gee, it's complicated.
| Next puzzle: how do we explain this?
Sunspots?
-----------------------------------------------------------------
To stop getting this list send a message containing just the word
"unsubscribe" to [EMAIL PROTECTED]
