Editing Additive synthesis (section)

===Products===
{{multiple image |direction=vertical |align=right |width=165
 | header   = Additive re-synthesis using timbre-frame concatenation:
 | image1   = Wavesequence.svg
 | caption1 = Concatenation with crossfades (on Synclavier)
 | image2   = Vocaloid's phonemes crossfading - en.jpg
 | caption2 = Concatenation with spectral envelope interpolation (on Vocaloid)
}}

New England Digital [[Synclavier]] had a resynthesis feature where samples could be analyzed and converted into "timbre frames" which were part of its additive synthesis engine. [[Technos acxel]], launched in 1987, utilized the additive analysis/resynthesis model, in an [[Additive synthesis#Inverse FFT synthesis|FFT]] implementation.

Also a vocal synthesizer, [[Vocaloid]] have been implemented on the basis of additive analysis/resynthesis: its spectral voice model called [[Excitation plus Resonances]] (EpR) model<ref name=BonadaICMC01>
{{cite journal    
 | last1        = Bonada | first1 = J.
 | last2        = Celma  | first2 = O.
 | last3        = Loscos | first3 = A.
 | last4        = Ortola | first4 = J.|first5=X. |last5=Serra |first6=Y. |last6=Yoshioka |first7=H. |last7=Kayama |first8=Y. |last8=Hisaminato |first9=H. |last9=Kenmochi
 | year         = 2001
 | title        = Singing voice synthesis combining Excitation plus Resonance and Sinusoidal plus Residual Models
 | periodical   = Proc. Of ICMC
 | citeseerx    = 10.1.1.18.6258
}} ([http://mtg.upf.edu/files/publications/icmc2001-celma.pdf PDF])</ref><ref>
{{cite thesis   
 | degree       = PhD
 | last         = Loscos | first = A.
 | year         = 2007
 | title        = Spectral processing of the singing voice
 | location     = Barcelona, Spain
 | publisher    = Pompeu Fabra University
| hdl= 10803/7542
 }} ([http://www.tdx.cat/bitstream/handle/10803/7542/talm.pdf?sequence=1 PDF]).<br/>
See "''<!-- 2.4.2.5 -->Excitation plus resonances voice model''" (p. 51)
</ref> is extended based on Spectral Modeling Synthesis (SMS),
and its [[Diphone synthesis|diphone]] [[concatenative synthesis]] is processed using
''spectral peak processing'' (SPP)<ref>{{harvnb|Loscos|2007|p=44}}, "''<!-- 2.4.2.2 -->Spectral peak processing"''</ref> technique similar to modified [[phase-locked vocoder]]<ref>{{harvnb|Loscos|2007|p=44}}, "''<!-- 2.4.2.1.2 -->Phase locked vocoder''"</ref> (an improved [[phase vocoder]] for formant processing).<ref name=BonadaSMAC03>
{{cite journal    
 | last1        = Bonada | first1 = Jordi
 | last2        = Loscos | first2 = Alex
 | year         = 2003
 | title        = Sample-based singing voice synthesizer by spectral concatenation: 6. Concatenating Samples
 | url          = http://mtg.upf.edu/node/322
 | periodical   = Proc. of <!-- the Stockholm Music Acoustics Conference --> SMAC 03
 | pages        = 439&ndash;442
}}</ref> Using these techniques, spectral components (''[[formant]]s'') consisting of purely harmonic partials can be appropriately transformed into desired form for sound modeling, and sequence of short samples (''diphones'' or ''[[phoneme]]s'') constituting desired phrase, can be smoothly connected by interpolating matched partials and formant peaks, respectively, in the inserted transition region between different samples. (See also [[Dynamic timbres]])