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linux-bxlw:/home/Documents/Audio/Aktiva/DSP # ecasound -i Mellow.wav -eadb:-10 -o alsa
**************************************************************************
* ecasound v2.8.1 (C) 1997-2011 Kai Vehmanen and others
**************************************************************************
(eca-chainsetup) WARNING: Unable to read global resources. May result in incorrect behaviour.
(eca-chainsetup) Chainsetup "untitled-chainsetup"
(eca-chainsetup) "rtlowlatency" buffering mode selected.
(eca-chainsetup) NOTE: using existing audio parameters -f:s24_le,2,192000 for object 'Mellow.wav' (tried to open with -f:s16_le,2,44100).
(eca-chainsetup) Opened input "Mellow.wav", mode "read". Format: s24_le, channels 2, srate 192000, interleaved (locked params).
(eca-chainsetup) Opened output "alsa", mode "write". Format: s16_le, channels 2, srate 192000, interleaved.
- [ Connected chainsetup: "untitled-chainsetup" ] ------------------------
- [ Controller/Starting batch processing ] -------------------------------
- [ Engine - Driver start ] ----------------------------------------------
(eca-engine) Using realtime-scheduling (SCHED_FIFO:50).

Mate je napisao/la:Meni je ovo linux makina i vjerojatno je problem negdje u postavkama ALSA-e prema kartici.
Moram to istražiti. Vidiš da je na konzoli i poruka (tried to open with -f:s16_le,2,44100).
Znači to su neke default postavke. Moram iskopati di je to.
Inače na mojoj pravoj DSP konstrukciji makine, ecasound je iskompajliran sa svim potrebnim opcijama tako da tamo nemam taj problem.
U principu, mogu natjerati ecasound da bilo što resamplira na koji god format (uz određene ograde, poneki zapisi i ne bi dobro prošli resampling). To treba još sve provjeriti.
No moja namjera je da se ne resamplira ništa nego da sve prođe kako je originalni zapis.

-f:sample_format,channel,sample-rate,interleaving
Sets the audio stream parameters for subsequent audio objects. To set different parameters for different audio objects, multiple '-f' options have to be specified (note the ordering, the '-f' options should precede the audio objects for them to have any effect). See documentation for '-i' and '-o' options.
When an audio object is opened (e.g. a file or sound device is opened, or connection is made to a sound server), the audio stream parameters are passed to the object. It should be noted that not all audio objects allow to set any or all of the parameters. For instance when opening existing audio files, many file formats have a header describing the file audio parameters. In these cases the audio file header overrides the parameters passed with '-f' option. Similarly when creating JACK inputs and outputs, the JACK server mandates the sampling rate and sample format.

If no '-f' option is specified, or some of the argument fields are left empty (e.g. '-f:,2,44100'), ecasound will use default values. These default values are defined in ecasoundrc configuration file. See ecasoundrc(5) manual page.

Note that ecasound opens out files by default in update mode. Unless option '-x' (overwrite outputs) option is given, audio parameters of an existing audio file take preference over the params set with '-f'.

Sample format is given as a formatted string. The first letter is either "u", "s" and "f" (unsigned, signed, floating point). The following number specifies sample size in bits. If sample is little endian, "_le" is added to the end. Similarly if big endian, "_be" is added. If endianness is not specified, host byte-order is used. Currently supported formats are "u8" (same as "8"), "s16_le" (same as "16"), "s16_be", "s24_le", "s24_be", "s32_le", "s32_be", "f32_le" and "f32_be". An empty string "" picks the system default sample format.

The 4th parameter defines the channel layout. The available options are 'i' (interleaved' and 'n' (noninterleaved). With the noninterleaved setting, ecasound will process samples one channel at a time, and the blocksize is set with '-b'. The default setting is 'i'.

Kod: Označi sve

ecasound -i Mellow.wav -eadb:-10 -o -f:s24_le,2,192000 alsa