Abstract: Systems and methods for musical tempo detection are provided. The method includes detecting peaks and their locations in a waveform of a digital audio track, and dividing the track into first measures with a first-measure length based on a first estimated tempo. The method includes determining distances between a beginning of the first measures and each peak location, and determining a first number of peaks having the same distance from the beginning of the first measures. The method includes dividing the track into second measures with a second-measure length based on a second estimated tempo; determining distances between a beginning of the second measures and each peak location; and determining a second number of peaks having the same distance from the beginning of each of the second measures. The method includes estimating an accurate tempo by comparing the first number of peaks and the second number of peaks.

Abstract: Systems and methods for providing audio-file loop-playback functionality are provided. The system includes a processor that performs a method including setting a playback loop start-point based on a first selection of a button; setting a loop end-point, associating a loop with an audio file, and entering into the loop based on a second selection of the button; and exiting the loop based on a third selection of the button. Associating the loop with the audio file includes adding metadata to the audio file. The metadata associates the loop with a button. The method includes reentering the loop based on a fourth selection of the button and exiting the loop based on a fifth selection of the button.

Abstract: Systems and methods for generating a graphical representation of audio signal data during time compression or expansion are provided. The system may include a processor that performs a method including displaying a waveform during audio-signal playback at a first speed by scrolling the waveform from aright portion of a display to a left portion of the display. The method includes receiving a command to increase or decrease the audio-signal playback speed and horizontally expanding or horizontally contracting the waveform in response to receiving the command to increase or decrease the audio-signal playback speed.

Abstract: An electronic-drum module for connection to one or more electronic-drum pads is provided. The module includes an electronic display; a first memory storing audio files for playback when the playback is triggered by a signal received from a pad; and one or more processors coupled to the display and the memory. The processors are configured receive an instruction to transfer a set of samples. The set of samples is associated with a priority-instruction and includes a first subset of samples and a second subset of samples. The processors are also configures to transfer the first subset of samples from a second memory to the first memory based on the priority-instruction before transferring the second subset of samples and to transfer the second subset of samples from the second memory to the first memory.

Abstract: Systems and methods for generating a visual color display of audio-file data are provided. The system includes a processor that performs a method including receiving audio-file data; generating filtered-audio data by processing the audio-file data by frequency-band filters. The frequency band filters have different frequency bands. The method includes generating one or more waveforms corresponding to the filtered-audio data and displaying the waveforms superimposed in unique color relative to one another. The method includes downsampling the waveforms. The method includes processing the waveforms through an envelope detector. The method includes processing the waveforms through an expander and applying a gain factor. The waveforms have transparency levels at sections that are proportional or inversely proportional to amplitudes at the sections.

Abstract: Systems and methods for generating a playback-information display during time compression or expansion of an audio signal are provided. The system includes a processor that performs a method including displaying a first remaining playback-time associated with an audio file; adjusting the playback speed of the audio file during playback of the audio file; and, in response to the playback speed being adjusted, automatically displaying a second remaining playback-time associated with the audio file during playback of the audio file.

Abstract: A guitar multi-effects pedalboard is provided. The pedalboard has footswitches and a memory storing guitar-effect presets for processing an inputted guitar signal when the processing is triggered by pressing a footswitch. The pedalboard has one or more processors coupled to the memory and configured to process a first portion of an inputted guitar signal on a first audio-engine thread with a first guitar-effect preset when processing the first portion is triggered by pressing a footswitch. The one or more processors also process a second portion of the inputted guitar signal on a second audio-engine thread with a second guitar-effect preset while simultaneously processing the first portion of the inputted guitar signal on the first audio-engine thread with the first guitar-effect preset when processing the second portion is triggered by pressing a footswitch. The one or more processors simultaneously output the processed first portion and the processed second portion.

Abstract: A controller device for the production of electronic music includes multiple control surfaces, including a touch sensitive display and a matrix of actuator pads, each of which are capable of operating in different modes simultaneously.

Abstract: Systems and methods for selecting an audio track by performing a gesture on a track-list image are provided. The system includes a processor that performs a method including displaying the audio-track list, detecting a contact with the touchscreen display at a location corresponding to the audio track, detecting a continuous movement of the contact in a direction, detecting a length of the continuous movement, and selecting the audio track if the continuous movement has a length longer than a threshold length. The method includes shifting text associated with the audio track based on the length and direction of the continuous movement. The method includes determining that the selection is a command to queue the audio track for playback or add it to a preparation track list. This determination may be based on the direction of the continuous movement.

Abstract: Systems and methods for generating a playback-information display during time compression or expansion of an audio signal are provided. The system includes a processor that performs a method including displaying a first remaining playback-time associated with an audio file; adjusting the playback speed of the audio file during playback of the audio file; and, in response to the playback speed being adjusted, automatically displaying a second remaining playback-time associated with the audio file during playback of the audio file.

Abstract: Systems and methods for providing audio-file loop-playback functionality are provided. The system includes a processor that performs a method including setting a playback loop start-point based on a first selection of a button; setting a loop end-point, associating a loop with an audio file, and entering into the loop based on a second selection of the button; and exiting the loop based on a third selection of the button. Associating the loop with the audio file includes adding metadata to the audio file. The metadata associates the loop with a button. The method includes reentering the loop based on a fourth selection of the button and exiting the loop based on a fifth selection of the button.

Abstract: An electronic-drum module for connection to one or more electronic-drum pads is provided. The module includes an electronic display, a memory storing audio files for playback when the playback is triggered by a signal received from a pad, and one or more processors coupled to the electronic display and the memory. The processors are configured to play a portion of the audio files when the playback is triggered by the signal received from the one or more electronic-drum pads. The processors are also configured to display, on the display, a user interface for an application, which includes a waveform associated with recorded audio. The processors are also configured to display, on the display, tempo gridlines with a tempo-gridline spacing over the waveform. The module includes a control for adjusting the tempo-gridline spacing. The control is a wheel and is actuated by a rotation of the wheel.

Abstract: An electronic drum-module for connection to electronic-drum pads is provided. The module includes an electronic display, a memory storing audio files for playback when the playback is triggered by a signal received from the pads, and one or more processors coupled to the electronic display and the memory. The processors are configured to play a portion of the one or more audio files when the playback is triggered by the signal received from the pads and to display, on the electronic display, a user interface for an application. The user interface includes a waveform associated with recorded audio. The user interface includes a sample-start marker and a sample-end marker. A portion of the waveform between the sample-start marker and sample-end marker is displayed brighter than a portion not between the sample-start marker and the sample-end marker. Playback of the portion may be initiated by striking a drum-pad zone.

Abstract: An electronic percussion device has a plurality of touch sensitive pad, an array of lighting elements disposed adjacent each pad, and a virtual display of the currently selected kit. The light array provides the user with immediate visual cue about the status and capabilities of the sound selections, without having to interrupt the user's performance. The user can color code and animate the illumination pattern of each light array so that, from a distance, the user is visually reminded what sounds are assigned to each pad, when sound associated with particular pad is currently playing, when playback of a sound associated with a pad is about to end.

Abstract: A standalone DJ console includes onboard audio data, user interface, processing engine and mixing module that enable multiple virtual audio players operating under the control of the processor to be mixed by virtual mixing processes into two different audio signal streams routable to different outputs of the console to provide two different audio streams to two separate spaces. The user interface is designed with a virtual display and parallel sets of controls which enable virtual representations of audio waveforms to be scrolled relative to an axis of time above the respective set of controllers used to manipulate the audio signal stream.

Abstract: A DJ media player is provided. The DJ media player has a control wheel used to control audio playback and a customizable first electronic display located about the center of the platter for displaying a graphic. The DJ media player has a second electronic display to show audio playback information. The graphic is dynamically updated. The graphic corresponds to at least one of a logo, an artist, an album, a song playback information, or a selection made by a user.

Abstract: A guitar pedalboard for creating a loop includes a touch screen display for displaying a plurality of tracks of a loop. The touch screen display can be used to adjust a parameter of each track, and the loop. A plurality of footswitches corresponding to the plurality of tracks can be used to independently record and play each track of the loop.

Abstract: An electronic percussion device has a plurality of triggerable actuators, in the form of any of pads, external trigger inputs or foot switches, that may be organized into synchronized groups, and has an operational mode in which triggering of any actuator within the synchronized group initiates playback of audio events or execution of control functions associated with other of the actuators within the synchronized group in one of multiple different synchronization orders, e.g. one at a time, all simultaneously, random or in a predefined or user-defined consecutive order.

Abstract: An electronic-drum module for connection to one or more electronic-drum pads is provided. The module includes an electronic display; a first memory storing audio files for playback when the playback is triggered by a signal received from a pad; and one or more processors coupled to the display and the memory. The processors are configured receive an instruction to transfer a set of samples. The set of samples is associated with a priority-instruction and includes a first subset of samples and a second subset of samples. The processors are also configures to transfer the first subset of samples from a second memory to the first memory based on the priority-instruction before transferring the second subset of samples and to transfer the second subset of samples from the second memory to the first memory.