Today's Top Stories:
 Pro Tools HD and Tiger
Digidesign has released version 6.9.2, a free upgrade to version 6.9 users that adds Tiger support for Pro Tools HD and HD Accel systems. Future updates will support Pro Tools LE and Pro Tools M-Powered systems on Mac OS X 10.4 (Tiger).
Time Is Running Out
We're nearing the final days of the special auction we're sponsoring with Marshall honoring the memory of slain metal guitarist "Dimebag" Darrell Abbott of Pantera and DamagePlan. Visit our site to bid on a Marshall AVT-20 amplifier signed by Darrell's brother Vinnie Paul Abbott (drummer for Pantera and DamagePlan), and Darrell's close friend Zakk Wylde (Ozzy Osbourne, Black Label Society). All proceeds will benefit the Dimebag Darrell Memorial Fund.
A Fine Vintage
For a limited time you can purchase four of Arturia's very cool vintage-emulating soft synths in one very reasonably priced bundle. The Arturia Vintage Collection includes Modular V, CS-80 V, Minimoog V, and Arp 2600 V. The bundle is compatible with both Mac and Windows.
Spinning Discs
Want to learn more about the inner workings of recordable optical media such as CD-R and DVD-R? This Wired article has some interesting insights.
New In Stock At Sweetwater
Apple's Soundtrack Pro takes a big leap beyond the original SoundTrack to become an amazingly powerful audio editing/production and sound design tool. We've got it in stock!
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| Difference Tone |
When two tones, or pitches, are sounded simultaneously, other tones can sometimes be heard, at a frequency that is the difference between the frequencies of the two tones being sounded. For example, if the two tones are 1500Hz and 2000Hz, the difference tone will be 500Hz (if the two original tones have sufficient intensity - over about 50dB).
The difference tone appears when the two tones are not part of a harmonic series (i.e., octaves, fifths, etc.) and have a frequency difference of 20Hz or greater. A difference of less than 20Hz will cause the difference of the two notes to be perceived as a pulse, called beating.
In acoustic music this effect is often noticeable when two clarinets are playing in thirds. |
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