Materials related to DIATONE, etc.
On this page, we will report various things about Diatone.
- Two way system using digital in-phase linear system
(1991)
A system that applies digital signal processing technology to a multi-way system.
Linear sound pressure frequency characteristics and phase frequency characteristics phase frequency characteristics that cannot be achieved with conventional analog signal processing technology.
This speaker system is a 2-way system developed as an example of its application.
- Diatone PA system
(1973)
This large-scale system was put into NHK Hall in Shibuya Ward in the year when the DS 251 mkII was released.
It consists of three sets of systems consisting of four low-frequency horns of 200 cm, two skorkers and ten tweeters.
Weighing about one ton per set, with a maximum output sound pressure level of 130dB/m and efficiency of 40%, it is a large speaker with a power equivalent to 10,000 W in a home speaker system.
- Fixed head type PCM magnetic recorder
(announced in October 1976)
This is the first prototype of a magnetic recorder using a fixed head type PCM system.
It uses 1/4-inch wide magnetic tape, and the mechanism is simplified by adopting 38cm/s deck.
This deck uses a crystal oscillator to control the wow and flutter to the accuracy of a crystal oscillator.
It also simplifies tape editing and tape monitoring.Frequency characteristic DC ~ 20 kHz ± 0.5 dB Dynamic range 78 dB or More (Without Acoustic Compensation) Harmonic distortion factor 0.1% or less (operating level) Wow flutter Crystal accuracy Magnetic tape 1/4-inch high-density magnetic tape Recording time 1 hour (Reel 10) Encoding and number of bits Natural binary, 13-bit Sampling frequency 48kHz External dimensions Width 660x Height 1,492x Depth 500 mm
- PCM Cassette Deck
(Date unknown, around the late' 70 s?)
By combining the rotary head mechanism with PCM processing technology for audio, PCM sound can be enjoyed easily. Moreover, the deck is designed to be able to handle PCM sound as well as ordinary audio cassette decks.
It was published in the same period as 4S-4002P (Monitor-1).Number of channels PCM:2ch
Bias recording : 1 chFrequency characteristic DC ~ 20 kHz ± 0.5 dB Dynamic range 80dB Distortion factor Not more than 0.03% Wow flutter Detection limit or less Recording time 2 hours Number of quantization bits 13-bit logic companding Sampling frequency 47.52kHz Drop-out compensation method Prior replacement method
- PCM Unit
(Date unknown, around the late' 70 s?)
This unit can be used as a PCM recording and playback device by simply connecting it to a home VTR. You can enjoy both audio and video.
It was published in the same period as 4S-4002P (Monitor-1).Number of channels PCM:2ch
Bias recording : 1 chFrequency characteristic DC ~ 20 kHz ± 0.5 dB Dynamic range 80dB Distortion factor Not more than 0.03% Wow flutter Detection limit or less Recording time 2 hours Number of quantization bits 13-bit logic companding Sampling frequency 45kHz Drop-out compensation method Prior replacement method