Complete Communications Engineering

VOCAL’s Parametric Equalization (EQ) Filtering software is available as an individual software library
module or as part of VOCAL’s customizable Voice Quality Enhancement (VQE) SDK. Parametric EQ filters
provides user/implementer with the ability to shape the audio signal to meet their design requirements
or subjective preference for quality.

VOCAL’s software provides five main types of EQ filters to choose from:

Request Voice Quality Enhancement brochure

parametric equalization diagram

EQ filters can be used in many points in the audio processing chain. For example, if an audio engineer needs to add some bass to the playback signal, then insert a low shelf filter with a positive gain factor. If the microphone signal contains a DC offset or low frequency noise, add a high pass filter to the audio chain. Parametric Equalization filters can be used to modified the frequency response of a signal to adhere to ITU and TIA Telephone performance standards.

Parametric Equalization Software Features

Parametric Equalization Applications

More Information


supported platforms

VOCAL’s Parametric Equalization Filters software is available for the following platforms. Please contact
us for specific EQ filters supported platforms and performance information.

ProcessorsOperating Systems
  • Texas Instruments – C6xx (TMS320C62x, TMS320C64x, TMS320C645x, TMS320C66x, TMS320C67x), DaVinci, OMAP, C5xx (TMS320C54x, TMS320C55x)
  • Analog Devices – Blackfin, ADSP-21xx, TigerSHARC, SHARC
  • PowerPC, PowerQUICC
  • MIPS – MIPS32, MIPS64, MIPS4Kc
  • ARM – ARM7, ARM9, ARM9E, ARM10E, ARM11, StrongARM, ARMCortex-A8/A9/A15/A3x/A5x/A7x, Cortex-M3/M4/M7/M33
  • Intel / AMD – x86, x64 (both 32 and 64 bit modes)
  • Linux, uClinux, BSD, Unix
  • Microsoft Windows ACM / RTC / CE / Mobile
  • Apple iOS / iPhone / iPad & MacOS
  • Google Android
  • Green Hills Integrity
  • Micrium μCOS
  • Symbian
  • Wind River VxWorks
  • eCOS / eCOSPro