US 7,119,267 B2 · Portable mixing recorder and method and program for controlling the same

Abstract

There is provided a portable mixing recorder which enables a user to readily produce music using overdubbing and/or other recording techniques while suppressing degradation of sound quality to the minimum without excessive concern for space restriction. An input analog audio signal is converted to a digital audio signal by an A/D converter section. A decoder reads out a compressed audio signal from an original source file stored in a memory card, and then extends the compressed audio signal to a digital audio signal. A mixing section mixes the digital audio signal obtained by the A/D conversion by the A/D converter section and the digital audio signal obtained by the extension by the decoder. An encoder compresses the digital audio signal obtained by the mixing by the mixing section to a compressed audio signal (mixed file). The mixed file obtained by the compression by the encoder is stored as a new source file in the memory card.

Claims25

Dependent claims

A portable mixing recorder comprising:

an input and conversion device that receives a maximum of a pair of analog audio signals and converts the pair of analog audio signals to a pair of first digital audio signals;
a decoding device that reads out a pair of compressed audio signals from an original source file stored in a predetermined memory and having the pair of compressed audio signals recorded therein, and then extends the pair of compressed audio signals into a pair of second digital audio signals;
a mixing device that mixes the pair of first digital audio signals and the pair of second digital audio signals into a pair of third digital audio signals;
a first encoding device that compresses the pair of third digital audio signals into a pair of compressed audio signals;
and
a storage control device that causes the pair of compressed audio signals obtained by said first encoding device to be stored in the predetermined memory, as a new source file,
wherein said decoding device, said mixing device, and said first encoding device are repeatedly operated to complete a musical piece formed of a pair of multiplexed and compressed audio signals.

4 more elements

A portable mixing recorder comprising:

an internal microphone;
an input and conversion device that receives a maximum of a pair of analog audio signals from the internal microphone and converts the pair of analog audio signals to a pair of first digital audio signals;
a reproduction device that reproduces a pair of second digital audio signals from a source file stored in a predetermined memory;
a recording instruction switch that is operable to instruct recording of the pair of first digital audio signals in the predetermined memory;
a recording-with-mixing instruction switch that is provided independently of said recording instruction switch, and is operable to instruct mixing of the pair of first digital audio signals and the pair of second digital audio signal into a pair of third digital audio signals signal, and recording of the pair of third digital audio signals in the predetermined memory;
and
a control device that causes the pair of first digital audio signals to be stored in the memory when said recording instruction switch is operated by a user, and causes the pair of first digital audio signals and the pair of second digital audio signals to be mixed into a pair of third digital audio signals, and the pair of third digital audio signals to be stored in the memory when said recording-with-mixing instruction switch is operated by the user
wherein said recording-with-mixing instruction switch and said control device are repeatedly operated to complete a musical piece formed of a pair of multiplexed audio signals.

5 more elements

Dependencies are inferred from the claim text.

Portable mixing recorder and method and program for controlling the same

Life of this patent

Portable mixing recorder and method and program for controlling the same

Life of this patent

Abstract

Claims25