A method is described comprising receiving a stem signal and an audio mix signal, wherein the audio mix signal comprises information of the stem signal. The method includes applying a first transform to the stem signal to provide a first stem spectrum, applying a second transform to the stem signal to provide a second stem spectrum, generating a plurality of mix signals using the audio mix signal, applying a first transform to each mix signal of the plurality of mix signals to provide a corresponding first mix signal spectrum, applying a second transform to each mix signal of the plurality of mix signals to provide a corresponding second mix signal spectrum, and using information of the first stem spectrum, the second stem spectrum, a first mix signal spectrum, or a second mix signal spectrum to detect the information of the stem signal in the audio mix signal.

An electronic effects device comprising: an input circuit for receiving an input audio signal; a gas discharge tube in communication with the input circuit; wherein the input circuit comprises a transducer for converting the input signal into a signal suitable for producing a discharge in the gas discharge tube; an output circuit in communication with the gas discharge tube for converting the gas discharge into an output signal. A corresponding method for producing electronic effects for musical instruments is also described.

An electronic device comprising a circuitry configured to perform (402; 602; 902; 1002) blind source separation (201) based on a received input signal (1) to obtain separated sources; to perform (403; 605; 906; 1005) time-domain filtering (202) on at least one of the separated sources to obtain at least one filtered separated source; and to perform (404; 606; 907; 1006) remixing or upmixing (203) based on the at least one filtered separated source.

A musical sound generation device including a blowing pressure sensor which detects a blowing pressure, a key switch which specifies a sound pitch of a musical sound, a first sound source which outputs a first signal corresponding to an exhalation sound, a second sound source which outputs a second signal corresponding to the musical sound having the sound pitch specified by the key switch, and a processor which starts output of the first signal by the first sound source on basis of an operation performed on the key switch, starts output of the second signal by the second sound source on basis of the blowing pressure, and controls a sound volume when the exhalation sound resulting from the first signal is emitted and a sound volume when the musical sound resulting from the second signal is emitted, on basis of the blowing pressure.

An electronic keyboard instrument includes: a keyboard including a plurality of keys; a plurality of switches that are provided for each key and include a first switch and a second switch that are sequentially turned on by pressing of the key; and a processor. The processor instructs that a noise sound corresponding to a selected musical instrument sound be produced in accordance with a prescribed first envelope upon detecting turning on of the first switch by pressing of the key, and instructs that a main musical sound corresponding to the selected musical instrument sound be produced after detecting turning on of the second switch.

A musical sound generation device including a blowing pressure sensor which detects a blowing pressure, a key switch which specifies a sound pitch of a musical sound, a first sound source which outputs a first signal corresponding to an exhalation sound, a second sound source which outputs a second signal corresponding to the musical sound having the sound pitch specified by the key switch, and a processor which starts output of the first signal by the first sound source on basis of an operation performed on the key switch, starts output of the second signal by the second sound source on basis of the blowing pressure, and controls a sound volume when the exhalation sound resulting from the first signal is emitted and a sound volume when the musical sound resulting from the second signal is emitted, on basis of the blowing pressure.

An electronic effects device comprising: an input circuit for receiving an input audio signal; a gas discharge tube in communication with the input circuit; wherein the input circuit comprises a transducer for converting the input signal into a signal suitable for producing a discharge in the gas discharge tube; an output circuit in communication with the gas discharge tube for converting the gas discharge into an output signal. A corresponding method for producing electronic effects for musical instruments is also described.

An electronic keyboard instrument includes: a keyboard including a plurality of keys; a plurality of switches that are provided for each key and include a first switch and a second switch that are sequentially turned on by pressing of the key; and a processor. The processor instructs that a noise sound corresponding to a selected musical instrument sound be produced in accordance with a prescribed first envelope upon detecting turning on of the first switch by pressing of the key, and instructs that a main musical sound corresponding to the selected musical instrument sound be produced after detecting turning on of the second switch.

A method is described comprising receiving a stem signal and an audio mix signal, wherein the audio mix signal comprises information of the stem signal. The method includes applying a first transform to the stem signal to provide a first stem spectrum, applying a second transform to the stem signal to provide a second stem spectrum, generating a plurality of mix signals using the audio mix signal, applying a first transform to each mix signal of the plurality of mix signals to provide a corresponding first mix signal spectrum, applying a second transform to each mix signal of the plurality of mix signals to provide a corresponding second mix signal spectrum, and using information of the first stem spectrum, the second stem spectrum, a first mix signal spectrum, or a second mix signal spectrum to detect the information of the stem signal in the audio mix signal.

An electronic device comprising a circuitry configured to perform (402; 602; 902; 1002) blind source separation (201) based on a received input signal (1) to obtain separated sources; to perform (403; 605; 906; 1005) time-domain filtering (202) on at least one of the separated sources to obtain at least one filtered separated source; and to perform (404; 606; 907; 1006) remixing or upmixing (203) based on the at least one filtered separated source.