# US 2014/0207265 A1 · Systems and Methods for Dynamic Audio Processing > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0207265 A1 - Document ID: US20140207265A1 - Status: Published application - Kind: A1 - Application number: 14/224,009 - Filed: 2014-03-24 - Published: 2014-07-24 - Earliest claimed: 2011-08-13 - Inventors: Colin Leonard - Web page: https://patentgrep.com/patent/US20140207265A1 ## CPC - G11B 27/005: {Reproducing at a different information rate from the information rate of recording (for television signals H04N5/783)} - H04R 3/04: for correcting frequency response - G06F 3/162: {Interface to dedicated audio devices, e.g. audio drivers, interface to CODECs} - G06F 16/60: of audio data - G10L 21/043: by changing speed - G11B 20/10018: {analog processing for digital recording or reproduction (G11B20/10037 - G11B20/10481 take precedence)} - G11B 27/031: Electronic editing of digitised analogue information signals, e.g. audio or video signals - H03G 3/002: {Control of digital or coded signals (H03G3/3089 take precedence)} - H03G 5/02: Manually-operated control - G10L 21/04: Time compression or expansion - H04R 2430/01: Aspects of volume control, not necessarily automatic, in sound systems - G11B: INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER (recording measured values in a way that does not require playback through a transducer G01D9/00; recording or playback apparatus using mechanically marked tape, e.g. punched paper tape, or using unit records, e.g. punched or magnetically marked cards G06K; transferring data from one type of record carrier to another G06K1/18; circuits for coupling output of reproducer to radio receiver H04B1/20; gramophone pick-ups or like acoustic electromechanical transducers or circuits therefor H04R) - H04R: LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS (producing sounds with frequency not determined by supply frequency G10K) - G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N) - G10L: SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING - H03G: CONTROL OF AMPLIFICATION ## Abstract Systems and methods presented herein may provide for processing audio with increased loudness and dynamics. A first clock frequency associated with a digital audio file may be increased to a second clock frequency, which speeds up the playback of the audio. The digital audio file may then be converted to analog at the higher second frequency, where it is further modified in the analog domain. The analog audio is then converted back into digital audio at the second clock frequency. The clock frequency is then decreased back to the first clock frequency for playback or storage of the processed (i.e., modified or manipulated) digital audio file. Alternatively, the entire process can take place in the digital domain. ## Claims ### Claim 1 A system for processing audio, the system comprising: a processor that plays a downloaded digital audio file, wherein the digital audio file is associated with a first clock frequency to use for normal playback, wherein the processor causes the digital audio file to play faster than normal at a second clock frequency that is higher than the first clock frequency; a digital-to-analog converter that converts the digital audio into an analog audio signal while the digital audio is playing at the higher second clock frequency; an analog circuit that applies at least one of compression, limiting, and equalization to the analog audio signal; an analog-to-digital converter that converts the manipulated analog audio signal into manipulated digital audio; and a non-transitory computer-readable storage medium that stores the manipulated digital audio, wherein the processor causes the manipulated digital audio file to be associated with the first clock frequency for normal playback speed. ### Claim 2 (depends on 1) The system of claim 1, wherein the second clock frequency is double the first clock frequency, causing the digital audio to play at twice the normal playback speed. ### Claim 3 (depends on 1) The system of claim 1, wherein causing the digital audio file to play at the second clock frequency includes setting metadata of the digital audio file to indicate the second clock frequency for playback. ### Claim 4 (depends on 1) The system of claim 1, wherein the analog circuit comprises: an input level control that manipulates a volume level of the analog audio signal prior to the at least one of compression, limiting, and equalization; and an output level control that manipulates the volume level of the analog audio signal subsequent to the at least one of compression, limiting, and equalization. ### Claim 5 (depends on 1) The system of claim 1, wherein the processor comprises a plurality of processors including a first processor on a first computer and a second processor on a second computer, wherein: the first processor causes the digital audio file to play at the second clock frequency, and the second processor sets metadata of the manipulated digital audio to the first clock frequency. ### Claim 6 (depends on 1) The system of claim 1, further including a monitoring circuit that allows a user to hear the effect of the modification applied by the analog circuit, wherein the monitoring circuit converts portions of the analog signal less than five seconds long into digital audio segments, and plays the digital audio segments at the first clock frequency while the analog signal is passing through the analog circuit. ### Claim 7 A method for mastering digital audio, the method including steps comprising: downloading a digital audio file having a first clock frequency for playback; outputting, for modification, a representation of audio based on a second clock frequency that is higher than the first clock frequency, wherein the representation of audio comprises one of the digital audio file or a representative analog signal, wherein the modification includes at least one of compression, equalization, and limiting; receiving a modified representation of the audio based on the second clock frequency; storing the modified representation of the audio as a modified digital audio file; and converting the clock frequency of the modified digital audio file to the first clock frequency. ### Claim 8 (depends on 7) The method of claim 7, further comprising converting the digital audio to an analog audio signal while the digital audio is playing at the second clock frequency, wherein the second clock frequency is twice the first clock frequency. ### Claim 9 (depends on 8) The method of claim 8, wherein the modification includes raising the volume to a level that would cause audible distortion when applied to a second analog audio signal generated by playing the digital audio file at the first clock frequency. ### Claim 10 (depends on 8) The method of claim 8, wherein a highest frequency containing audio information is increased from 22,500 Hz to 44,100 KHz. ### Claim 11 (depends on 7) The method of claim 7, wherein the digital audio file comprises at least a portion of a song within a digital audio workstation environment containing multiple audio tracks, wherein the modified digital audio file replaces at least the portion of the single audio track within the digital audio workstation environment. ### Claim 12 (depends on 7) The method of claim 7, wherein monitoring is provided with playback using the first clock frequency while the digital audio file is playing at the second clock frequency. ### Claim 13 (depends on 7) The method of claim 7, wherein the second clock frequency is twice the first clock frequency. ### Claim 14 (depends on 7) The method of claim 7, wherein the modification is applied in the digital domain. ### Claim 15 An audio processing device, comprising: an input interface that downloads and stores at least a portion of a digital audio file that has a first clock frequency for normal playback; a processor that increases the playback clock frequency of the digital audio to a higher second frequency without converting the sample rate of the digital audio; a digital-to-analog converter that converts the digital audio to analog audio at the second clock speed; an analog modification circuit that applies at least one of compression, limiting, and equalization to the analog audio; an analog-to-digital converter that converts the modified analog audio to modified digital audio; a non-transitory computer-readable storage medium that stores the modified digital audio, wherein the modified digital audio is thereafter assigned the first clock frequency for normal playback; and an output interface that outputs the modified digital audio. ### Claim 16 (depends on 15) The audio processing device of claim 15, wherein the input interface connects to a digital audio workstation, and the input interface communicates with the digital audio workstation in order to receive the digital audio file from the digital audio workstation. ### Claim 17 (depends on 15) The audio processing device of claim 15, wherein the processor automatically calculates the second frequency based on metadata in the digital audio file regarding the first frequency. ### Claim 18 (depends on 15) The audio processing device of claim 15, wherein the second clock frequency is twice the first clock frequency. ### Claim 19 (depends on 15) The audio processing device of claim 15, wherein the output interface communicates with a digital audio workstation running on a computer, and outputs the digital audio to the computer for storage.