1. A method of decoding audio data indicative of a plurality of higher-order ambisonic (HO A) coefficients, the method comprising:', 'determining whether to perform vector dequantization or scalar dequantization with respect to a decomposed version of the plurality of HO A coefficients.

2. The method of claim 1, further comprising performing the vector dequantization based on the determination.

3. The method of claim 2, wherein performing the vector dequantization comprises determining one or more weight values that represent a vector that is included in the decomposed version of the plurality of HO A coefficients, each of the weight values corresponding to a respective one of a plurality of weights included in a weighted sum of the code vectors that represents the vector.

4. The method of claim 3, wherein determining the weight values comprises determining a set of N weight values.

5. The method of claim 4, further comprising obtaining a bitstream that includes a syntax element indicative of which of the M greatest weight values were selected from a weight value codebook.

6. The method of claim 5,', 'wherein the weight value codebook is one of a plurality of weight value codebooks, and', 'wherein obtaining the bitstream comprises obtaining the bitstream that also includes a syntax element that identifies the weight value codebook of the plurality of weight value codebooks from which the M greatest weight values were selected.

7. The method of claim 3, further comprising determining which of the set of code vectors to use with a corresponding one of the weight values to represent the decomposed version of the plurality of HO A coefficients.

8. The method of claim 3, further comprising determining which of the set of code vectors to use with a corresponding one of the weight values to represent the decomposed version of the plurality of HOA coefficients based on a syntax element included in the bitstream indicative of a vector index.

9. The method of claim 1, further comprising obtaining a bitstream that includes a syntax element identifying whether the vector quantization or the scalar quantization was performed

10. A device configured to decode audio data indicative of a plurality of higher- order ambisonic (HOA) coefficients, the device comprising:', 'a memory configured to store the audio data; and', 'one or more processors configured to determine whether to perform vector dequantization or scalar dequantization with respect to a decomposed version of the plurality of HOA coefficients

11. The device of claim 10, wherein the one or more processors are further configured to perform the scalar dequantization based on the determination

12. The device of claim 11, wherein the one or more processors are further configured to obtain a bitstream that includes a field indicating a value that expresses a quantization step size or a variable thereof used when compressing the decomposed version of the plurality of HOA coefficients

13. The device of claim 10, wherein the one or more processors are further configured to perform the vector dequantization with respect to a first portion of the decomposed version of the plurality of HOA coefficients based on the determination, and perform the scalar dequantization with respect to a second portion of the decomposed version of the plurality of HOA coefficients based on the determination

14. The device of claim 10, wherein the one or more processors are configured to determine whether to perform the vector dequantization or the scalar dequantization with respect to the decomposed version of the plurality of HOA coefficients based on a threshold bitrate

15. The device of claim 14, wherein the threshold bitrate comprises 256 kilobits per second (Kbps)

16. The device of claim 14, wherein the one or more processors are configured to determine to perform the vector dequantization with respect to the decomposed version of the plurality of HOA coefficients when the threshold bitrate is equal to or below 256 kilobits per second (Kpbs)

17. The device of claim 14, wherein the one or more processors are configured to determine to perform the scalar dequantization with respect to the decomposed version of the plurality of HOA coefficients when the threshold bitrate above 256 kilobits per second (Kpbs)

18. The device of claim 14,', 'wherein the one or more processors are further configured to reconstruct the HOA coefficients based on the decomposed version of the HOA coefficients and render the HOA coefficients to loudspeaker feeds, and', 'wherein the device further comprises speakers driven by the loudspeaker feeds to reproduce a soundfield represented by the HOA coefficients

19. A method of encoding audio data, the method comprising:', 'determining whether to perform vector quantization or scalar quantization with respect to a decomposed version of a plurality of higher order ambisonic (HOA) coefficients.

20. The method of claim 19, further comprising performing the vector quantization based on the determination.']