1. A method comprising:', 'performing, based on a target bitrate, order reduction with respect to a plurality of spherical harmonic coefficients or decompositions thereof to generate reduced spherical harmonic coefficients or the reduced decompositions thereof, wherein the plurality of spherical harmonic coefficients represent a sound field.

2. The method of claim 1, further comprising, prior to performing the order reduction, performing a singular value decomposition with respect to the plurality of spherical harmonic coefficients to identify one or more first vectors that describe distinct components of the sound field and one or more second vectors that identify background components of the sound field,', 'wherein performing the order reduction comprises performing the order reduction with respect to the one or more first vectors, the one or more second vectors or both the one or more first vectors and the one or more second vectors.

3. The method of claim 1, further comprising performing a content analysis with respect to the plurality of spherical harmonic coefficients or the decompositions thereof, wherein performing the order reduction comprises performing, based on the target bitrate and the content analysis, the order reduction with respect to the plurality of spherical harmonic coefficients or the decompositions thereof to generate the reduced spherical harmonic coefficients or the reduced decompositions thereof.

4. The method of claim 3, wherein performing the content analysis comprises performing a spatial analysis with respect to the plurality of spherical harmonic coefficients or the decompositions thereof.

5. The method of claim 3, wherein performing the content analysis comprises performing a diffusion analysis with respect to the plurality of spherical harmonic coefficients or the decompositions thereof.

6. The method of claim 4, wherein performing the content analysis comprises performing a spatial analysis and a diffusion analysis with respect to the plurality of spherical harmonic coefficients or the decompositions thereof.

7. The method of claim 1, further comprising specifying one or more orders and/or one or more sub-orders of spherical basis functions to which those of the reduced spherical harmonic coefficients or the reduced decompositions thereof correspond in a bitstream that includes the reduced spherical harmonic coefficients or the reduced decompositions thereof.

8. The method of claim 1, wherein the reduced spherical harmonic coefficients or the reduced decompositions thereof have less values than the plurality of spherical harmonic coefficients or the decompositions thereof.

9. The method of claim 1 , wherein performing the order reduction comprises removing those of the plurality of spherical harmonic coefficients or vectors of the decompositions thereof having a specified order and/or sub-order to generate the reduced spherical harmonic coefficients or the reduced decompositions thereof

10. The method of claim 1, wherein performing the order reduction comprises zeroing out those of the plurality of spherical harmonic coefficients or those vectors of the decomposition thereof having a specified order and/or sub-order to generate the reduced spherical harmonic coefficients or the reduced decompositions thereof

11. A device comprising:', 'one or more processors configured to perform, based on a target bitrate, order reduction with respect to a plurality of spherical harmonic coefficients or', 'decompositions thereof to generate reduced spherical harmonic coefficients or the reduced decompositions thereof, wherein the plurality of spherical harmonic coefficients represent a sound field

12. The device of claim 11, wherein the one or more processors are further configured to, prior to performing the order reduction, perform a singular value decomposition with respect to the plurality of spherical harmonic coefficients to identify

one or more first vectors that describe distinct components of the sound field and one or more second vectors that identify background components of the sound field,', 'wherein the one or more processors are configured to perform the order reduction with respect to the one or more first vectors, the one or more second vectors or both the one or more first vectors and the one or more second vectors

13. The device of claim 11, wherein the one or more processors are further configured to performing a content analysis with respect to the plurality of spherical harmonic coefficients or the decompositions thereof, and', 'wherein the one or more processors are configured to perform, based on the target bitrate and the content analysis, the order reduction with respect to the plurality of spherical harmonic coefficients or the decompositions thereof to generate the reduced spherical harmonic coefficients or the reduced decompositions thereof

14. The device of claim 13, wherein the one or more processors are configured to perform a spatial analysis with respect to the plurality of spherical harmonic coefficients or the decompositions thereof

15. The device of claim 13, wherein the one or more processors are configured to perform a diffusion analysis with respect to the plurality of spherical harmonic coefficients or the decompositions thereof

16. The method of claim 14, wherein the one or more processors are configured to perform a spatial analysis and a diffusion analysis with respect to the plurality of spherical harmonic coefficients or the decompositions thereof

17. The device of claim 11, wherein the one or more processors are further configured to specify one or more orders and/or one or more sub-orders of spherical basis functions to which those of the reduced spherical harmonic coefficients or the reduced decompositions thereof correspond in a bitstream that includes the reduced spherical harmonic coefficients or the reduced decompositions thereof

18. The device of claim 11, wherein the reduced spherical harmonic coefficients or the reduced decompositions thereof have less values than the plurality of spherical harmonic coefficients or the decompositions thereof

19. The device of claim 11, wherein the one or more processors are configured to remove those of the plurality of spherical harmonic coefficients or vectors of the decompositions thereof having a specified order and/or sub-order to generate the reduced spherical harmonic coefficients or the reduced decompositions thereof.

20. The device of claim 11, wherein the one or more processors are configured to zero out those of the plurality of spherical harmonic coefficients or those vectors of the decomposition thereof having a specified order and/or sub-order to generate the reduced spherical harmonic coefficients or the reduced decompositions thereof.

21. A device comprising :', 'means for storing a plurality of spherical harmonic coefficients or', 'decompositions thereof; and', 'means for performing, based on a target bitrate, order reduction with respect to the plurality of spherical harmonic coefficients or decompositions thereof to generate reduced spherical harmonic coefficients or the reduced decompositions thereof, wherein the plurality of spherical harmonic coefficients represent a sound field.

22. A non-transitory computer-readable storage medium having stored thereon instructions that, when executed, cause one or more processors to:', 'perform, based on a target bitrate, order reduction with respect to a plurality of spherical harmonic coefficients or decompositions thereof to generate reduced spherical harmonic coefficients or the reduced decompositions thereof, wherein the plurality of spherical harmonic coefficients represent a sound field.']