Cd,sacd & Dvd-a

[shokhead]

How low can each disc play a recorded sound? Lower Hz?

 

[mtrycrafts]

How low can each disc play a recorded sound? Lower Hz?

I have read that Tom Nousaine has measured 5Hz on the Telarc 1812 CD
There used to be an online site with lowest frequency on some Cds but now I cannot find it, or the name escapes me.

 

[shokhead]

Wow!

Didnt think 5Hz was possible on a reg cd.

 

[skizzerflake]

Didnt think 5Hz was possible on a reg cd.

I don't think it is, but I'm not sure about a SACD. Unless you have some sort of super-woofer, you couldn't do anything with a 5 hz signal anyway. You couldn't hear it either although if it were loud enough, you could feel it. If you don't have enough woofer, all you would get from 5 hz is a big power surge that might clip your amp without delivering anything audible. If your woofer could reproduce it, 5 hz would also make it sound really weird due to severe doppler effect distortion. It would add a disturbing quaver to frequencies above that subsonic note. You probably need a cannon simlar to the ones used for the 1812 Overture.

 

[nav]

I can't think of any reason a CD would not be able to store a low-frequency tone of any sort except for storage limitations (a storage limit of one second makes 1 Hz or less unrealistic; a standard CD can hold 4440 seconds). High frequencies are another matter entirely.

Use an audio editing program (such as Audacity, for a free option) to generate a 5 Hz (or lower) tone, save it to a WAV file, and burn it to a CD. Rip the CD to WAV and open it again in Audacity. If the sine wave remains intact: your CD just reproduced that signal.

Whether or not your listening system can reproduce the data on the CD is another matter (please take care if you try this; sine waves at any frequency, especially at full amplitude, can be less than healthy for your equipment).

 

[mtrycrafts]

I don't think it is, but I'm not sure about a SACD. Unless you have some sort of super-woofer, you couldn't do anything with a 5 hz signal anyway. You couldn't hear it either although if it were loud enough, you could feel it. If you don't have enough woofer, all you would get from 5 hz is a big power surge that might clip your amp without delivering anything audible. If your woofer could reproduce it, 5 hz would also make it sound really weird due to severe doppler effect distortion. It would add a disturbing quaver to frequencies above that subsonic note. You probably need a cannon simlar to the ones used for the 1812 Overture.

Well, some do have super subs A few have been pictured at this site. Tom Nousaine has 4 or 8 18" subs in an infinite baffle arrangement.
Just recently someone posted a link where a 16Hz wave was making a carpet float.

Yes, it is all sensory, not auditory.

 

[shokhead]

limited

I just thought a cd was limited as compared to a DVD-A/SACD.

 

[racquetman]

I just found this info. Don't know if it's correct or not.

"The human-ear cannot hear DC or very low frequencies. Most CD players will not reproduce any frequencies below 10 Hz and hence we have freedom to add or remove low-frequency waveforms. Such addition and removal will greatly alter the peak excursion of the master. This form of processing will also compensate for any DC offset present in the pre-masters."

from: http://koo.corpus.cam.ac.uk/mixerton/whitepapers/mastering/mastering.html

 

[no. 5]

agan, not shure if this is right, but, I would think that recievers input and output freqency response would be enough to 'not leave any sounds behind' as it were, so I looked up a Yamaha and a Denon, both had a CD input FR of 10Hz to 100kHz.

 

[shokhead]

?

I mean what each disc is capable of,not what the equipment will let them do.

 

[no. 5]

I mean what each disc is capable of,not what the equipment will let them do.

right, I got that.

 

[mtrycrafts]

I found the link to low fr on cd

How low can each disc play a recorded sound? Lower Hz?

Here you go. Many with very low content

http://www.lymanfamily.org/lyman/randy/audio/low_hz.html