topic Walkman DRM free .m4b support in Portable Audio https://community.sony.at/t5/portable-audio/walkman-drm-free-m4b-support/m-p/1357170#M2023 <P>Does anyone have any experience with playing back DRM free .m4b audiobooks on walkmans?</P><P>&nbsp;</P><P>Thanks</P> Sun, 29 Sep 2013 19:13:29 GMT Catmambo 2013-09-29T19:13:29Z Walkman DRM free .m4b support https://community.sony.at/t5/portable-audio/walkman-drm-free-m4b-support/m-p/1357170#M2023 <P>Does anyone have any experience with playing back DRM free .m4b audiobooks on walkmans?</P><P>&nbsp;</P><P>Thanks</P> Sun, 29 Sep 2013 19:13:29 GMT https://community.sony.at/t5/portable-audio/walkman-drm-free-m4b-support/m-p/1357170#M2023 Catmambo 2013-09-29T19:13:29Z