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OMASA 3ISM 2TC 32 kbps Encoder: High frequency noise burst

Basic info

  • Float reference:
    • Encoder (float): efe53129c9ed87a5067dd0a8fb9dca41db9c4add
    • Decoder (float): efe53129c9ed87a5067dd0a8fb9dca41db9c4add
  • Fixed point:
    • Encoder (fixed): ac900052
    • Decoder (fixed): n/a

Bug description

For the BASOP Encoder there is a small noise burst next to the encoded sine signal, which is not there in float:

BASOP:

Bildschirmfoto 2026-02-15 um 10.24.28.png

Float:

Bildschirmfoto 2026-02-15 um 10.24.36.png

Ways to reproduce

IVAS_cod -ism_masa 3 2 ltv48_OMASA_3ISM_2TC_ISM1.csv ltv48_OMASA_3ISM_2TC_ISM2.csv ltv48_OMASA_3ISM_2TC_ISM3.csv ltv48_OMASA_3ISM_2TC.met 32000 48 ltv48_OMASA_3ISM_2TC.wav bit.192

IVAS_dec binaural 16 bit.192 out.wav