themaddog said:I've heard about a bass boost or compression that occurs at 15 ips, but does not happen at 30 ips. Is there such a boost at 7.5 ips? Or is there something magical about 15 ips?
Just curious. Thanks,
-MD
acorec said:PS: at 7.5 ips, you still get the bass compression, but you also get the "hiss" big time.
cjacek said:I feel that "hiss" and it being a "problem" is very subjective. I use my TEAC 3440 and Quantegy 407 (I prefer it over 456) and although there is a bit of tape hiss, it is there in the background without it being a problem at all. In fact, I think it enhances the character of the analog sound. (And that's only at 7 1/2 ips mind you). Now, what I can't stand is an audio recording with no audible trace of tape hiss! How's that for subjective ?
~Daniel
acorec said:No, hiss is a problem and is not subjective at all. If it were subjective and not a problem, then 2" 30 ips would have not been invented.
a TEAC 3440, being a four track home stereo machine is alot different than a 2" 24 track machine. I am sure that if you ran a 24 track machine at 7 1/2 ips you would definitely think there was a problem with the hiss. At that point, it would not be subjective. It would be rejective.
Have a great chrismas and a happy new year.
Farview said:The problem your missing is that instead of 3 tracks of hiss, you have 24 tracks of hiss. If the hiss is the same on all the tracks, every track will add another 3db of hiss. That adds up very fast. Not to mention any additional high end you might need to eq a few of the tracks (adding to the hiss) to make what ever is on those tracks sound right.
I'll second that big time and also add that machines that are factory designed to run at 30 ips do so not only in the speed of the transport set up but in designing heads that are gapped for 30 ips!Beck said:That being said, I prefer the sound I get with standard tape formulations at 15 ips.
The Ghost of FM said:I'll second that big time and also add that machines that are factory designed to run at 30 ips do so not only in the speed of the transport set up but in designing heads that are gapped for 30 ips!
The main reason for bass roll off at all at 30 ips compared to 15 ips is because the machine in question was employing heads that were NOT designed for 30 ips in the first place.
My TASCAM MS-16 deck can be modded for 30 ips speed but, the manual doesn't detail it because they knew that the heads they put on the deck were not designed for it so they smartly left it hidden as a feature.
They're are specific decks out there in the professional realm that are factory designed to run at 30 ips from Studer, Otari, Sony, Ampex and a couple of other strictly pro manufacturers and they in all cases, put heads on their decks that are gapped for 30 ips and all of those cases, you simply end up with a clean, quiet, flat recording deck.
Cheers!
cdbstudios said:30 ips = what you hear going in is what you hear coming back