In Odeon version 9.0 the import of 3D models from CAD programs has been improved a lot. The auralisation has been made more realistic with regards to localisation and out of head experience. More possibilities of graphical presentations from the OpenGL viewer is made available. And it is possible to get a fast look at the direct sound from loudspeaker setups. Also it is possible in Odeon version 9.0 to calculate transmission from one room to another.
Improved diffraction handling and calculation of transmission through walls (including auralization)
A wall type can assigned to each wall in the Materials list; the wall type can be assigned one of the following values: Normal, Exterior ,Fractional and Transmission. The Normal type is business as usual where as Exterior and Neutral allows fine tuning the diffraction algorithm applied, i.e. telling how Odeon or if the Reflection Based Scattering algorithm should be Applied. When the Transmission wall type is selected, transmission through walls can be investigated, even walls with different materials on either side or with a thickness can be handled.
The Specify Transmission data dialog allows entering transmission data for selected walls in 3rd octave bands. The data can be entered manually or pasted directly from a spreadsheet.
Professional Audio formats (auralization in Auditorium and Combined editions)
Wave files in numerous formats are supported on the input side as well as on the output side, the formats include: 16 bit PCM, 24 bit PCM, 32 bit PCM (32 bit float 16 bit aligned!), 32 bit IEEE float, 8 bit PCM, Extensible, 16 bit PCM, Extensible, 24 bit PCM, Extensible, 32 bit PCM, Extensible, 32 bit IEEEfloat, Extensible, 8 bit PCM. On the input side this means the files which are edited in programs such Adobe Audition are supported directly (the IEEE float format) this makes it easier to work with - but more important a lossy conversion into the 16 bit integer format is avoided. On the output side, it means that audio can be saved to float formats thus avoiding quantization - this is important if the audio formats are to be edited later on, indeed if mixing numerous Auralization files even from within the Auralization list in Odeon, quantization noise is avoided. Specify the file type in Auralization Setup or in set the program defaults in Program setup.
Dither including Noise shaping (auralization in Auditorium and Combined editions)
When saving auralization results into the integer format such as the widely used 16 bit wave format, this can be done using noise shaped dither, minimizing negative influences of quantization. Dithering and Noise shaping is selected in the Auralization Setup.
The Source macro allow changing source data such as position, directivity pattern, gain and equalization on a number of sources in a single operation.
Subdirectories for source directivities and for auralization
It is now possible to include a subdirectory when selecting directivity patterns for point sources. This makes it possible to organize directivity patterns in folders e.g. to keep directory from a specific manufacturer in a folder of its own making it simpler to make use of large libraries of loudspeakers such as these available in the Common Loudspeaker Format at www.clfgroup.org.
Similar it is possible to use subdirectories for the wave files used for auralization. These changes relates to the source list, the auralization list and the Streaming Convolution displays.
Limitation on number of sources, convolutions etc.
The maximum number of sources, convolutions, auralization mixes and convolutions in a mix has been increased. It is now possible to define 300 sources, 300 convolutions, 50 mixes and to include 300 convolutions in one mix. This makes it possible to carry out a complete orchestra simulation in a single operation.
Increased calculation speed - support for SSE and SSE2 instruction
Even though ODEON has always been able to provide excellent calculation speeds we have been able reduce the calculation time further, without in any way compromising the quality of results. By making use of CPU specific instructions we have been able to reduce calculation time, benchmarks suggests reductions of 0 to 30% for Multi Point Response calculations.
Enhanced 3DOpenGL display
Two small enhancements has been added to the 3DOpenGL display. Discrete receivers are visualized in the 3DOpenGL display when a job is selected (Ctrl+J and Ctrl+Shift+J shortcuts).
The Cut-off plane can be adjusted, using the P and Shift+P shortcuts. This allows looking into a geometry from a position outside the room without the walls hindering sight.
Activating all sources in a job
The Ctrl+SPACE shortcut can be used to de/activate all sources in a job - this feature is available from the Source-Receiver List as well as from the JobList.
Copying a job or an auralization setup in the JobList or in the Auralization list
Select the job or auralization setup to be copied and Press Ctrl+C. Select the target job or auralization setup and press Ctrl+V to copy all columns or Alt+V if you only wish to paste the selected column.
Tabulate Sources and Receivers
The Tabulate receiver, point source or array source dialog is available from within the Source Receiver List.
The Align expert has been extended. The align expert helps aligning sources and receivers relative to the closes surface in x, y or z direction.
3D Direct Sound
The 3D Direct Sound display is a new facility which calculates and visualizes direct sound from point sources. This is a useful tool for studying direct sound mapping from multiple sources. Results are useful for design of loudspeaker systems and comes (almost) instantaneous.
The Auto Grid allows automatic detection of the surfaces used in a receiver grid such as the one used in the 3D Direct sound display above. A great timesaver for complicated room, especially those imported from a CAD messy file.
Improved import of CAD models
Import of CAD models in the 3DStudio format (.3ds) is supported. The 'Glue surfaces' algorithm has been enhanced to improve OpenGL visualization and to handle a number of short-comings and errors which are often present in CAD files see the following reference http://odeon.dk/pdf/ODEON_Import_of_CAD_files_in_the_DXF_format.pdf (requires internet access) . A new import option allows changing the orientation of the coordinate system in the imported geometry as well as changing the position of Origo in the model.
An example of ODEON doing its magic on an imported geometry. On the left; the geometry before ODEON applies it Glue surfaces algorithm, on the right the useful geometry which has been enhanced for calculations as well as for visualization. The processing has reduced the number of surfaces from 1362 to 209.
Improved localization (Auditorium and combined editions only)
The algorithms for enhanced localization which has been Odeons Algorithms for improvement of localization and out of head experience for binaural Auralization has been further improved. The M factor which specifies how much to increase frequency dip (and thus notches) in imported HRTF's can be set to as much as 1.3 without noticeable colouration.