EP 0546619 A2 19930616 - Low frequency audio doubling and mixing circuit.
Title (en)
Low frequency audio doubling and mixing circuit.
Title (de)
Schaltung zur Mischung und Verdoppelung von niedrigen Tonfrequenzen.
Title (fr)
Circuit pour mélanger et doubler les basses fréquences audio.
Publication
Application
Priority
US 80535691 A 19911209
Abstract (en)
A circuit for doubling and mixing low frequency audio signals includes an input for receiving an audio signal having a substantially wide frequency range, a circuit coupled to said input means for separating signal components in a low frequency band of the audio signal from the wide frequency range thereof, a frequency doubler coupled to the separating circuit for doubling the frequencies of the signal components in the low frequency band, and a mixer for mixing the frequency doubled signal components with the input audio signal, whereby the signal components in the low frequency band now also appear one octave higher.
IPC 1-7
IPC 8 full level
H04R 3/04 (2006.01); H04R 5/04 (2006.01); H04S 1/00 (2006.01)
CPC (source: EP)
H04R 3/04 (2013.01); H04R 5/04 (2013.01); H04S 1/00 (2013.01)
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
EP 0546619 A2 19930616; EP 0546619 A3 19940420; EP 0546619 B1 19980923; DE 69227091 D1 19981029; DE 69227091 T2 19990520; JP H05328481 A 19931210
DOCDB simple family (application)
EP 92203748 A 19921203; DE 69227091 T 19921203; JP 32672992 A 19921207