Choosing a Tape Type

Some tape types are no longer available on the world market. Chrome and cobalt tapes are among them.

FERRIC TAPE: National Audio Company is now manufacturing the highest quality ferric cassette tape available in the world today, FerroMaster C456TM. This new product has been long anticipated and recording industry orders are in production.

FerroMaster C456TM is an ultra-high performance Type I cassette tape delivering the highest signal-to-noise ratio (head room) ever achieved by a ferric cassette tape and is created with the finest magnetic recording oxide ever discovered. FerroMaster C456TM delivers the high output and frequency response previously available only in the best type II tapes. It is designed to be recorded at very high levels and provides deep, mellow bass, warm mid-range, and crystal clear high frequencies. Cassette tape products offered by National Audio (whether loaded into blank cassette shells or duplicated into professional recording releases) are loaded with FerroMaster C456TM.  Test results and specifications for the product have been finalized and are available for consumers and audio pros.

CHROME TAPE: Some remaining chrome tape is still available at National Audio packaged into our 799 Series Studio Master tapes. However, it is no longer available in sufficient quantities for duplication projects. Buy individual tapes in our online store here.

Use of Dolby Encoding

Dolby encoding of audio is intended to reduce the tape noise on the copied tapes, while leaving the original audio unchanged. Dolby encoding does not fix the sound of the master. Dolby is not recommended on duplication projects unless you are sure the listeners will have Dolby settings on their playback equipment.

Here’s how Dolby works. The original master is run through a Dolby encoder that basically boosts the upper frequencies while the audio is quiet, and doesn’t boost as much when the audio is loud (relative to a set threshold). The copy tapes are duplicated with this encoding of shifted frequencies; and when played back in a deck with Dolby B engaged, the decoder reverses the boosts that were added to the original audio by the Dolby encoder according to the program levels that it senses. The result should be that the original audio sounds unchanged, but the tape noise (most noticeable in the higher frequencies) of the copy tapes has been reduced by almost 10db.

Our sound engineers may be able to repair or improve imperfect masters. Contact Customer Service for more information on these services.