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In Reply to: RE: Why?... posted by kootenay on January 29, 2021 at 15:12:11
The ones I bought prerecorded are ALL IEC, and I made that a standard when I make recordings.
The only NAB tapes I have are the commercial prerecorded old tapes on 7" reels, and for those I am using a Teac machine, which is, naturally, an NAB device.
Otherwise, all my high quality tapes are in IEC.
You can standardize on either EQ - they are close to each other, but since IEC is slightly better, today it is the most common high end format.
Follow Ups:
I don't have any commercially recorded tapes anymore. Presently I'm using the Revoxes RTR for home recordings only.
If a thing's worth doing, it's worth doing well
(Proverb)
When you record and play using the same EQ the difference will be minor, IEC has a bit less hiss and it has better HF extension at high level. PR99 is a fine machine, if calibrated properly it will deliver wonderful performance.
What tape are you using?
Pro-grade low noise tapes from Maxell, TDK, and BASF that I bought years ago. However, recently I've been buying some pancake tapes from the local pro-audio shop that sounded quite good which is better than I would expect from a generic brand.
If a thing's worth doing, it's worth doing well
(Proverb)
Edits: 01/29/21
That pro studio tape is most likely something like SM468 or SM900, which require VERY different calibration - usually they would not get enough bias. It is great tape, I use a lot of it, but the machine must be calibrated for it.
My Revox PR99 MKII machine is calibrated at RMGI Tape: 900 Flux: 250 nWb/m for 7 1/2" and 15" IPS speed record and play. All I know the tech told me that this calibration will work high with output tapes from +3 dB, +6 dB, and +9 dB. In hindsight, perhaps I should have asked him to calibrated it to 350 nWb/m do you think it would make a big difference in sound?
If a thing's worth doing, it's worth doing well
(Proverb)
Yes, you could have gone higher, but you can just set the level above the usual, when you are recording. Use the music you are familiar with, and keep raising the level, until you start hearing the distortion, then back down a bit. But that's for your RGM tapes, the Maxells will not go that high.
When some of my recordings have slightly distorted and or saturated sounds for no apparent reason. I thought the tape was damaged or something until I lowered the recording input signal to a more acceptable level and voila everything snapped into place.However, some of the generic pancake tapes that I bought though I don't know who manufactured them probably from China seems to work well on higher recording level devoid of distortion and saturation in sound. Oh well, live and learn I suppose.
If a thing's worth doing, it's worth doing well
(Proverb)
Edits: 01/30/21
I reckon distortion is the produced by vibration of the cassette body, as I've been alluding to these past couple of weeks. Dynamic range and signal to noise ratio in audio systems are certainly constrained by internal or external vibration, that's one thing we've learned for sure in the last 25 years of so, for any medium, tape, CD, vinyl, whatever. Even the wires and cables suffer the indignity of vibration.
Edits: 01/31/21
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