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Diffstat (limited to 'mda.lv2/Dither.ttl')
| -rw-r--r-- | mda.lv2/Dither.ttl | 124 |
1 files changed, 124 insertions, 0 deletions
diff --git a/mda.lv2/Dither.ttl b/mda.lv2/Dither.ttl new file mode 100644 index 0000000..9f41510 --- /dev/null +++ b/mda.lv2/Dither.ttl @@ -0,0 +1,124 @@ +@prefix doap: <http://usefulinc.com/ns/doap#> . +@prefix lv2: <http://lv2plug.in/ns/lv2core#> . +@prefix mda: <http://drobilla.net/plugins/mda/> . +@prefix pg: <http://lv2plug.in/ns/ext/port-groups#> . +@prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> . +@prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> . + +mda:Dither + a lv2:Plugin , + lv2:DistortionPlugin ; + lv2:project mda: ; + lv2:symbol "Dither" ; + doap:name "MDA Dither" ; + doap:shortdesc "Range of dither types including noise shaping" ; + doap:license <http://usefulinc.com/doap/licenses/gpl> ; + lv2:optionalFeature lv2:hardRTCapable ; + pg:mainInput mda:mainIn ; + pg:mainOutput mda:mainOut ; + rdfs:comment """When a waveform is rounded to the nearest 16 (or whatever)-bit value this causes distortion. Dither allows you to exchange this rough sounding signal-dependant distortion for a smooth background hiss. + +Some sort of dither should always be used when reducing the word length of digital audio, such as from 24-bit to 16-bit. In many cases the background noise in a recording will act as dither, but dither will still be required on fades and on very clean recordings such as purely synthetic sources. + +Noise shaping makes the background hiss of dither sound quieter, but adds more high-frequency noise than 'ordinary' dither. This high frequency noise can be a problem if a recording is later processed in any way (including gain changes) especially if noise shaping is applied a second time. + +If you are producing an absolutely final master at 16 bits or less, use noise shaped dither. In all other situations use a non-noise-shaped dither such as high-pass-triangular. When mastering for MP3 or other compressed formats be aware that noise shaping may take some of the encoder's 'attention' away from the real signal at high frequencies. + +No gain changes should be applied after this plug-in. Make sure any master output fader is set to 0.0 dB in the host application. + +Very technical note This plug-in follows Steinberg's convention that a signal level of 1.0 corresponds to a 16-bit output of 32768. If your host application does not allow this exact gain setting the effectiveness of dither may be reduced (check for harmonic distortion of a 1 kHz sine wave using a spectrum analyser).""" ; + lv2:port [ + a lv2:InputPort , + lv2:ControlPort ; + lv2:index 0 ; + lv2:name "Word Len" ; + lv2:symbol "word_len" ; + lv2:default 0.5 ; + lv2:minimum 0.0 ; + lv2:maximum 1.0 + ] , [ + a lv2:InputPort , + lv2:ControlPort ; + lv2:index 1 ; + lv2:name "Dither" ; + lv2:symbol "dither" ; + lv2:default 0.0 ; + lv2:minimum 0.0 ; + lv2:maximum 1.0 ; + lv2:portProperty lv2:enumeration ; + lv2:scalePoint [ + rdfs:label "Truncation" ; + rdf:value 0.0 + ] , [ + rdfs:label "Triangular PDF dither" ; + rdf:value 0.33333333 + ] , [ + rdfs:label "High-pass Triangular PDF dither" ; + rdf:value 0.66666666 + ] , [ + rdfs:label "Second-order noise-shaped dither" ; + rdf:value 1.0 + ] + ] , [ + a lv2:InputPort , + lv2:ControlPort ; + lv2:index 2 ; + lv2:name "Dith Amp" ; + lv2:symbol "dith_amp" ; + lv2:default 0.5 ; + lv2:minimum 0.0 ; + lv2:maximum 1.0 ; + rdfs:comment """Dither amplitude - can be turned down to reduce background hiss at the expense of dither level "pumping" caused by the input signal type and level""" + ] , [ + a lv2:InputPort , + lv2:ControlPort ; + lv2:index 3 ; + lv2:name "DC Trim" ; + lv2:symbol "dc_trim" ; + lv2:default 0.5 ; + lv2:minimum 0.0 ; + lv2:maximum 1.0 ; + rdfs:comment "Fine tune DC offset - can help get best dither sound for silent or very quiet inputs" + ] , [ + a lv2:InputPort , + lv2:ControlPort ; + lv2:index 4 ; + lv2:name "Zoom" ; + lv2:symbol "zoom" ; + lv2:default 0.0 ; + lv2:minimum 0.0 ; + lv2:maximum 1.0 ; + rdfs:comment """Allows the signal to be faded into the noise floor at a clearly audible level so dither settings can be "auditioned". Note that some (perceptual) properties of dither will change when listened to in this way""" + ] , [ + a lv2:InputPort , + lv2:AudioPort ; + lv2:index 5 ; + lv2:symbol "left_in" ; + lv2:name "Left In" ; + lv2:designation pg:left ; + pg:group mda:mainIn + ] , [ + a lv2:InputPort , + lv2:AudioPort ; + lv2:index 6 ; + lv2:symbol "right_in" ; + lv2:name "Right In" ; + lv2:designation pg:right ; + pg:group mda:mainIn + ] , [ + a lv2:OutputPort , + lv2:AudioPort ; + lv2:index 7 ; + lv2:symbol "left_out" ; + lv2:name "Left Out" ; + lv2:designation pg:left ; + pg:group mda:mainOut + ] , [ + a lv2:OutputPort , + lv2:AudioPort ; + lv2:index 8 ; + lv2:symbol "right_out" ; + lv2:name "Right Out" ; + lv2:designation pg:right ; + pg:group mda:mainOut + ] . |