A Tinny Speaker Is Not Automatically a Codec Bug

Acoustic complaints have to be separated into source, amplifier, transducer and enclosure effects.

The practical ownership question in A Tinny Speaker Is Not Automatically a Codec Bug was simple to state and harder to prove. A field report described the LOUP prototype speaker as very tinny, while the manufacturer compared the part to a phone speaker and requested the unit back for testing.

Changing EQ or codec gain before measuring the physical speaker can hide the real issue. The useful comparison is a known tested speaker, the returned device, enclosure loading, amplifier path and captured electrical output. That tells us whether the problem starts in firmware, the component, assembly or acoustics.

The debugging order stayed conservative: verify wiring and state transitions first, then tune performance only after correctness had been established. Evidence marker: tinny-speaker-field-report.

Audio quality is a system property. Firmware should not become the default explanation for every sound produced by the enclosure. The broader result is a system that can be changed incrementally because each layer has a measurable responsibility and a known recovery path.

Project evidence

LOUP engineering marker: tinny-speaker-field-report. This note records the design or debugging lesson without publishing device credentials, private keys, customer data or manufacturing secrets.