LEAD Audio SPDIF Passthru

The LEAD Audio SPDIF Passthru is a DirectShow® filter for passing the AC3 (Dolby Digital) or AAC (DTS) surround sound signal to an S/PDIF audio renderer.

The LEAD Audio SPDIF Passthru filter passes surround sound signals including 5.1, 6.1 and 7.1 to external devices, such as surround sound systems or home theater receivers, that are capable of decoding a Dolby Digital or DTS signal.

When used in conjunction with an external device capable of decoding AC3 (Dolby Digital) or AAC (DTS) files, the LEAD Audio SPDIF Passthru filter makes it possible for a user to play AC3/AAC files without a software AC3/AAC decoder. Without either the external device or LEAD Audio SPDIF Passthru filter, the user will need a software AC3/AAC decoder to play AC3/AAC encoded files.

If speakers are connected to an external device capable of decoding a Dolby Digital or DTS signal, passing the S/PDIF signal to the external device provides higher quality audio because the external device decodes the audio to preserve the surround effect. Software decoding without passing the S/PDIF signal to an external device will often generate only stereo sound, even if the audio source is surround sound.

Component	Description
Filter Interface(s)	N/A
Interface ID	N/A
Input Media Types	MEDIATYPE_Audio
	MEDIASUBTYPE_DOLBY_AC3
	MEDIATYPE_MPEG2_PES
	MEDIASUBTYPE_DOLBY_AC3
	MEDIATYPE_DVD_ENCRYPTED_PACK
	MEDIASUBTYPE_DOLBY_AC3
	MEDIATYPE_Audio
	MEDIASUBTYPE_AC3
Output Media Types
	MEDIATYPE_Audio
	MEDIASUBTYPE_PCM
	MEDIATYPE_Audio
	MEDIASUBTYPE_DOLBY_AC3_SPDIF
Filter CLSID	CLSID_LDecSPDIF
Filter Category	CLSID_LegacyAmFilterCategory
Executable	LDecSPDIF.dll (Win32) / LDecSPDIFx.dll (x64)