A mixing system including a plurality of cascaded mixing apparatus, said cascaded mixing apparatus including a main mixing apparatus including a main operation section configured to receive operation by a user, a first mixing apparatus (200, 200a) comprising an input for audio signals from a first input source, and a second mixing apparatus (200, 200b) comprising an input for audio signals from a second input source; said mixing system comprising: an auxiliary operation section configured to receive operation by a user different from the operation received via said main operation section; a main output section (200b, 34, 36) configured to output an audio signal to a sound system; an auxiliary output section (200b, 38b) configured to output a monitoring audio signal; a mode selection section (72, 73) configured to select either one of a first control mode for causing the signal of said first input source after being processed by said first mixing apparatus, to be first routed to said main mixing apparatus, and to be subsequently routed to said second mixing apparatus for output through said main output section (200b, 34, 36) and a second control mode for causing the signal of said second input source after being processed by said second mixing apparatus, to be first routed to said main mixing apparatus, and to be subsequently routed to said second mixing apparatus for output through said main output section (200b, 34, 36); a first control section (40, 52, 54) configured to control, in said first control mode, mixing processing of said first mixing apparatus for mixing the audio signals, inputted from the first input source, in response to operation received via said main operation section, to thereby cause a result of the controlled mixing processing of said first mixing apparatus to be outputted through said main output section (200b, 34, 36) and to control mixing processing of said second mixing apparatus for mixing the audio signals, inputted from the second input source, in response to operation received via said auxiliary operation section, to thereby cause a result of the controlled mixing processing of said second mixing apparatus to be outputted through said auxiliary output section (200b, 38b); and a second control section (40, 52, 54) configured to control, in said second control mode, the mixing processing of said second mixing apparatus for mixing the audio signals, inputted from the second input source, in response to operation received via said main operation section, to thereby cause a result of the controlled mixing processing of said second mixing apparatus to be outputted through said main output section (200b, 34, 36) and to control the mixing processing of said first mixing apparatus for mixing the audio signals, inputted from the first input source, in response to operation received via said auxiliary operation section, to thereby cause a result of the controlled mixing processing of said first mixing apparatus to be outputted through said auxiliary output section (200b, 38b). an auxiliary operation section configured to receive operation by a user different from the operation received via said main operation section; a main output section (200b, 34, 36) configured to output an audio signal to a sound system; an auxiliary output section (200b, 38b) configured to output a monitoring audio signal; a mode selection section (72, 73) configured to select either one of a first control mode for causing the signal of said first input source after being processed by said first mixing apparatus, to be first routed to said main mixing apparatus, and to be subsequently routed to said second mixing apparatus for output through said main output section (200b, 34, 36) and a second control mode for causing the signal of said second input source after being processed by said second mixing apparatus, to be first routed to said main mixing apparatus, and to be subsequently routed to said second mixing apparatus for output through said main output section (200b, 34, 36); a first control section (40, 52, 54) configured to control, in said first control mode, mixing processing of said first mixing apparatus for mixing the audio signals, inputted from the first input source, in response to operation received via said main operation section, to thereby cause a result of the controlled mixing processing of said first mixing apparatus to be outputted through said main output section (200b, 34, 36) and to control mixing processing of said second mixing apparatus for mixing the audio signals, inputted from the second input source, in response to operation received via said auxiliary operation section, to thereby cause a result of the controlled mixing processing of said second mixing apparatus to be outputted through said auxiliary output section (200b, 38b); and a second control section (40, 52, 54) configured to control, in said second control mode, the mixing processing of said second mixing apparatus for mixing the audio signals, inputted from the second input source, in response to operation received via said main operation section, to thereby cause a result of the controlled mixing processing of said second mixing apparatus to be outputted through said main output section (200b, 34, 36) and to control the mixing processing of said first mixing apparatus for mixing the audio signals, inputted from the first input source, in response to operation received via said auxiliary operation section, to thereby cause a result of the controlled mixing processing of said first mixing apparatus to be outputted through said auxiliary output section (200b, 38b).