Part Number: TAS2521EVM
I'm using the EVM with a 4-ohms speaker,
I'm driving the board with different wav files (pure sine, white noise, simple bell, and a human spoken sentence),
I'm measuring the acoustic levels.
Setup = 24 dB amplifier, -10 dB driver, DAC adjusted from -30 to +5 dB.
I can reach a max 95dBa with a 1kHz sinewave, when DAC=+5.
The output sustains the white noise wave at DAC=+5, producing 87dBa.
The output sustains the bell wave at DAC=+5, producing 90dBa.
When it comes to the human voice (only 2 simple words in the sentence), I cannot go above DAC=-5 (80 dBa), the output is muted randomly (P0/R46/D7=0).
Any hint how to solve this problem?
In reply to Mike Tripoli:
I have checked the audio file with Audacity, nothing to report.
I have also crossfaded the transients (start/end of words) + LPF the entire file, no change.
(see next answer as well)
In reply to Ivan Salazar:
In reply to Eric Szaleniec:
You can take a look at the recommended filter values from the following Application Note: http://www.ti.com/lit/an/slaa701a/slaa701a.pdfAlso you could consider using the recommended filter values from TAS2552/TAS2560:
Best regards,-Ivan SalazarApplications Engineer - Low Power Audio & Actuators
thank you for the App Note, I'll manage from here.
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