Audio DSP Engineer


San Francisco


Founded by legendary filmmaker George Lucas in 1983, THX sets performance standards for world-class studios and cinemas, and provides premium audio and video solutions for mobile devices, PCs, home, and automotive. THX develops technologies, products and specifications that perfect the consumer entertainment experience, and enable the artist to deliver their true vision.


Reports to VP, Engineering

Specific Responsibilities

Summary The Audio DSP Engineer will design and implement computationally-efficient audio processing solutions for host-based as well as fixed-purpose, resource-constrained digital signal processing targets, including desktop PCs, mobile handsets, and embedded loudspeaker and headset devices.  Essential Duties and Responsibilities
  • Build, test, and reliably deliver DSP binaries and interface definition libraries, to support low-power audio processing and other embedded implementations
  • Prepare cycle-accurate as well as generalized audio test and validation plans, to support technician-driven, scripted and inference-based build integration scenarios
  • Partner with UX/UI and platform engineers to refine existing product offerings, to develop new cutting-edge audio processing implementations in support of vendor, customer and end-user requirements
  • Review and optimize existing algorithmic implementations to support generalized development across multiple test and deployment targets
  • Implement THX-specific intellectual property for integration into third-party DSP libraries, as commercial requirements dictate
  • Other duties as assigned.


To perform this job successfully, an individual must be able to perform each essential duty satisfactorily. The requirements listed below are representative of the knowledge, skill, and/or ability required. Reasonable accommodations may be made to enable individuals with disabilities to perform the essential functions. 
  • 5+ years experience as a DSP engineer delivering production-grade audio signal processing firmware
  • Multiple-platform experience with audio DSP targets, including but not limited to:
    • Cadence Xtensa / Tensilica HiFi 3
    • Qualcomm Hexagon
    • Qualcomm / CSR Kalimba
    • Analog Devices SigmaDSP
    • TI PurePath DSP
    • Synaptics / Conexant
  • Sufficient understanding of desktop PC platforms (Windows, Linux) as both a development environment as well as a deployment target for offloaded processing
  • Familiarity with desktop and mobile audio plugin architectures is a plus
  • Familiarity with DSP Concepts’ Audio Weaver is a plus, though not required
  • Excellent written and verbal communication skills, in service of cross-team and partner-focused documentation for third-party certification, deployment, testing and product maintenance


BA/BS degree in Electrical Engineering, Mathematics or related discipline, or equivalent industry experience.

Personal Characteristics

Preferred Language Skills Ability to read, analyze, and interpret complex documents. Ability to respond effectively to all types of inquiries. Ability to write speeches and articles using original or innovative techniques or style. Ability to make effective and persuasive speeches and presentations on controversial or complex topics to top management, public groups, and/or boards of directors. Written and spoken proficiency in US English required; additional language proficiencies, including Mandarin, Cantonese or other CJVK languages are a plus. A research-level technical reading proficiency is critical for success in this position. Mathematical Skills Ability to add, subtract, multiply, and divide in all units of measure, using whole numbers, common fractions, and decimals. Ability to compute rate, ratio, and percent and to draw and interpret bar graphs. Engineering mathematics proficiency is required, including but not limited to familiarity with integral and differential calculus, linear algebra, discrete maths, and numerical analysis. Prior experience with desktop engineering applications such as MATLAB, Mathematica, Jupyter notebooks is recommended. An understanding of algorithmic analysis – including quantification of code, stack and memory size for a given signal processing block – is required for this position. Reasoning Ability Ability to apply common sense understanding to carry out instructions furnished in written, oral or diagram form. Ability to deal with problems involving several variables in unusual situations. Ability to use effective deductive reasoning is essential. Ability to weigh risks, commercial and/or technical uncertainties, trade offs, and incomplete or changing information to inform team priorities. Computer Skills To perform this job successfully, an individual should have familiarity with integrated development and source-control environments, including but not limited to Microsoft Visual Studio and GitHub / Atlassian Bitbucket, shared documents (Google Docs / Adobe Acrobat / Microsoft 365), direct messaging for team communication (Slack / Microsoft Teams), and issue tracking applications (Atlassian JIRA). Each DSP target platform will generally provide its own application-specific IDE, with which a successful candidate should demonstrate extensive familiarity.  Certificates & Licenses No certificates or licenses are required. Supervisory Responsibilities This position has no supervisory responsibilities.


The work environment characteristics described here are representative of those an employee encounters while performing the essential functions of this job. Reasonable accommodations may be made to enable individuals with disabilities to perform the essential functions. The noise level in the work environment is usually moderate. Physical Demands The physical demands described here are representative of those that must be met by an employee to successfully perform the essential functions of this job. Reasonable accommodations may be made to enable individuals with disabilities to perform the essential functions. The employee must occasionally lift and/or move up to 30 pounds. While performing the duties of this Job, the employee is regularly required to sit; use hands to handle, or feel; reach with hands and arms and talk or hear. The employee is occasionally required to stand and walk. Travel Requirements No travel requirements.

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THX Ltd. is an equal opportunity employer. We recruit, employ, train, compensate, and promote without regard to race, religion, creed, color, national origin, age, gender, sexual orientation, marital status, veterans status, or disabilities. Pursuant to the San Francisco Fair Chance Ordinance, we will consider for employment qualified applicants with arrest and conviction records.

THX Ltd. does not accept unsolicited resumes from third-party recruiters, including and without limitation, search firms, staffing agencies, fee-based referral services and recruiting agencies. Any resume submitted to any employee of THX Ltd. will be considered unsolicited and deemed gratuitous without having a written vendor agreement in place and only to the extent such agreement covers a specified position. THX Ltd. will not pay a placement fee. Verbal or written commitments from any other member of THX Ltd. staff will not be binding. It is the responsibility of all third-party recruiting/supplemental staffing agencies to know this policy.

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