A recording and playback device comprising: a storage control section which stores in a memory section sound data for an amount of time corresponding to a beat among sound data acquired from an external source as beat sound data; a repeat playback section which repeatedly replays loop sound data stored in the memory section characterized in that a loop sound data creating section which creates the loop sound data in bar units by copying and connecting the beat sound data by a specified number of times, and stores the loop sound data in the memory section; an overdubbing section which performs an operation to overdub sound data acquired from the external source during replaying of the loop sound data onto the loop sound data being replayed, and store the overdubbed sound data as loop sound data in the memory section; wherein the storage control section includes: a recording time setting section which sets a recording time for a beat determined by tempo specified in advance, and a recording executing section which performs an operation to record inputted sound data in the memory section from when sound data exceeding a threshold value is inputted until when the recording time set by the recording time setting section elapses, and wherein the loop sound data creating section creates the loop sound data in bar units by copying and connecting the beat sound data by a number of times determined by meter specified in advance by a user as the specified number of times. a storage control section which stores in a memory section sound data for an amount of time corresponding to a beat among sound data acquired from an external source as beat sound data; a repeat playback section which repeatedly replays loop sound data stored in the memory section characterized in that a loop sound data creating section which creates the loop sound data in bar units by copying and connecting the beat sound data by a specified number of times, and stores the loop sound data in the memory section; an overdubbing section which performs an operation to overdub sound data acquired from the external source during replaying of the loop sound data onto the loop sound data being replayed, and store the overdubbed sound data as loop sound data in the memory section; wherein the storage control section includes: a recording time setting section which sets a recording time for a beat determined by tempo specified in advance, and a recording executing section which performs an operation to record inputted sound data in the memory section from when sound data exceeding a threshold value is inputted until when the recording time set by the recording time setting section elapses, and wherein the loop sound data creating section creates the loop sound data in bar units by copying and connecting the beat sound data by a number of times determined by meter specified in advance by a user as the specified number of times. a recording time setting section which sets a recording time for a beat determined by tempo specified in advance, and a recording executing section which performs an operation to record inputted sound data in the memory section from when sound data exceeding a threshold value is inputted until when the recording time set by the recording time setting section elapses, and wherein the loop sound data creating section creates the loop sound data in bar units by copying and connecting the beat sound data by a number of times determined by meter specified in advance by a user as the specified number of times.