---
title: MPEG4ObjectID.twinVQ
framework: coreaudiotypes
role: symbol
role_heading: Case
path: coreaudiotypes/mpeg4objectid/twinvq
---

# MPEG4ObjectID.twinVQ

A constant that specifies transform-domain weighted interleaved vector quantization.

## Declaration

```swift
case twinVQ
```

## Discussion

Discussion This audio codec optimizes audio coding at ultra-low bit rates of around 8 kbit/s.

## See Also

### Constants

- [MPEG4ObjectID.AAC_LC](coreaudiotypes/mpeg4objectid/aac_lc.md)
- [MPEG4ObjectID.AAC_LTP](coreaudiotypes/mpeg4objectid/aac_ltp.md)
- [MPEG4ObjectID.aac_Main](coreaudiotypes/mpeg4objectid/aac_main.md)
- [MPEG4ObjectID.AAC_SBR](coreaudiotypes/mpeg4objectid/aac_sbr.md)
- [MPEG4ObjectID.AAC_SSR](coreaudiotypes/mpeg4objectid/aac_ssr.md)
- [MPEG4ObjectID.aac_Scalable](coreaudiotypes/mpeg4objectid/aac_scalable.md)
- [MPEG4ObjectID.CELP](coreaudiotypes/mpeg4objectid/celp.md)
- [MPEG4ObjectID.HVXC](coreaudiotypes/mpeg4objectid/hvxc.md)