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Compiling G2p Models

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cadlaxa edited this page Jul 16, 2024 · 2 revisions

Examples of G2p Models that are included in OpenUTAU:

Compiling the G2p Model (Internal Model)

Adding The Data Source

  • After packing the G2p model into a zip file, place the zip file on \OpenUtau\OpenUtau.Core\G2p\Data
  • open the Resources.resx and drag and drop the g2p zip file on the window then save. This will automatically update the Resources.Designer.cs to add the zip file as a data resource.
    • note: the Resources.Designer.cs has a bug that redirects the resources to G2p.Data.Resouces instead of the root directory OpenUtau.Core.G2p.Data.Resources. Please rename the line 42 in order to make the G2p's work properly.
    • Replace G2p.Data.Resouces to OpenUtau.Core.G2p.Data.Resources.
  • Before:
if (object.ReferenceEquals(resourceMan, null)) {
                    global::System.Resources.ResourceManager temp = new global::System.Resources.ResourceManager("G2p.Data.Resources", typeof(Resources).Assembly);
                    resourceMan = temp;
                }
  • After:
if (object.ReferenceEquals(resourceMan, null)) {
                    global::System.Resources.ResourceManager temp = new global::System.Resources.ResourceManager("OpenUtau.Core.G2p.Data.Resources", typeof(Resources).Assembly);
                    resourceMan = temp;
                }
  • Create the .cs file on \OpenUtau\OpenUtau.Core\G2p.
  • Set up the graphemes and phonemes that matches the G2p model.
  • Edit the LoadPack code and link the G2p zip file.

Adding the model to Phonetic Assistant

Adding the model to Lyrics Helper

Compiling the G2p Model (External Model)

Adding The Data Source

  • After packing the G2p model into a zip file and created the initial external phonemizer, place the zip file on a folder called Resources.
  • Create the Resources.resx and drag and drop the G2p zip file on the window then save. Rename the Custom Tool Namespace same as the name of the project. Custom Tool Namespace are found on the properties panel or Alt + Enter.
  • Resources.Designer.cs will update as well and make sure the resources directory are correct. It should be (project-name.Resources)
  • Create the .cs file.
  • Set up the graphemes and phonemes that matches the G2p model.
  • Edit the LoadPack code and link the G2p zip file.
    • Example tree view:
    • image

Prioritizing the dict.text over the g2p.onnx

Adding The Data Source

This will make the G2pPack class uses entries from dict.txt first. If not found, it uses g2p.onnx to generate phonemes.

  • Editing the order of the code will make the G2ppack prioritize the dict.text over the g2p.onnx.
    • from:
    private static object lockObj = new object();
private static Dictionary<string, int> graphemeIndexes;
private static IG2p dict;
private static InferenceSession session;
private static Dictionary<string, string[]> predCache = new Dictionary<string, string[]>();

// public class name of the g2p 
        GraphemeIndexes = graphemeIndexes;
        Phonemes = phonemes;
        Dict = dict;
        Session = session;
        PredCache = predCache;
    • to:
    private static object lockObj = new object();
private static IG2p dict;
private static Dictionary<string, int> graphemeIndexes;
private static InferenceSession session;
private static Dictionary<string, string[]> predCache = new Dictionary<string, string[]>();

// public class name of the g2p 
        Dict = dict;
        PredCache = predCache;
        GraphemeIndexes = graphemeIndexes;
        Phonemes = phonemes;
        Session = session;

G2p

G2p (Grapheme to phoneme) can convert lyrics in natural languages to phoneme sequences. OpenUTAU has built-in G2ps for multiple languages, implemented using a machine learning model, which can cover most of the words in the language, and can predict the pronunciation of new words that have not been seen before. Using a unified G2p can make the pronunciation of the same lyrics consistent on different phonemizers.

For languages ​​with a large number of words, and words cannot be converted into phoneme sequences through simple logic, such as English, French, and Russian, please use OpenUTAU's built-in G2p.

Custom pronunciation dictionary

On the basis of G2p, considering that some voicebanks have custom phonemes, a phonemizer should support custom dictionaries. Custom dictionaries can be loaded using G2pDictionary.

No matter which encoding the voicebank uses, yaml dictionaries should always use UTF-8 encoding.

Here is an example of custom dictionary:

%YAML 1.2
---
symbols:
  - {symbol: aa, type: vowel}
  - {symbol: ae, type: vowel}
  - {symbol: ah, type: vowel}
  - {symbol: ao, type: vowel}
  - {symbol: aw, type: vowel}
  - {symbol: ay, type: vowel}
  - {symbol: b, type: stop}
  - {symbol: ch, type: affricate}
  - {symbol: d, type: stop}
  - {symbol: dh, type: fricative}
  - {symbol: eh, type: vowel}
  - {symbol: er, type: vowel}
  - {symbol: ey, type: vowel}
  - {symbol: f, type: fricative}
  - {symbol: g, type: stop}
  - {symbol: hh, type: aspirate}
  - {symbol: ih, type: vowel}
  - {symbol: iy, type: vowel}
  - {symbol: jh, type: affricate}
  - {symbol: k, type: stop}
  - {symbol: l, type: liquid}
  - {symbol: m, type: nasal}
  - {symbol: n, type: nasal}
  - {symbol: ng, type: nasal}
  - {symbol: ow, type: vowel}
  - {symbol: oy, type: vowel}
  - {symbol: p, type: stop}
  - {symbol: r, type: liquid}
  - {symbol: s, type: fricative}
  - {symbol: sh, type: fricative}
  - {symbol: t, type: stop}
  - {symbol: th, type: fricative}
  - {symbol: uh, type: vowel}
  - {symbol: uw, type: vowel}
  - {symbol: v, type: fricative}
  - {symbol: w, type: semivowel}
  - {symbol: y, type: semivowel}
  - {symbol: z, type: fricative}
  - {symbol: zh, type: fricative}
entries:
  - grapheme: openutau
    phonemes: [ow, p, eh, n, w, uw, t, ah, w, uw]

When reading and writing yaml files, OpenUtau always uses yaml 1.2 syntax. If you're developing third-party tools to parse or generate these yaml files, please use ruamel.yaml instead of pyyaml library.

NOTE: Since Openutau doesn't have a built-in dictionary editor yet. Use Openutau Dictionary Editor for edit the YAML dictionary. This tool can be used as external plugin for Openutau by placing it to the plugins folder

Appendix: Phoneme set of builtin G2Ps

ArpabetG2p (English)

  • vowels: aa, ae, ah, ao, aw, ay, eh, er, ey, ih, iy, ow, oy, uh, uw
  • consonants: b, ch, d, dh, f, g, hh, jh, k, l, m, n, ng, p, r, s, sh, t, th, v, w, y, z, zh

GermanG2p

  • vowels: aa, ae, ah, ao, aw, ax, ay, ee, eh, er, ex, ih, iy, oe, ohh, ooh, oy, ue, uh, uw, yy
  • consonants: b, cc, ch, d, dh, f, g, hh, jh, k, l, m, n, ng, p, pf, q, r, rr, s, sh, t, th, ts, v, w, x, y, z, zh

ItalianG2p

  • vowels: a, a1, e, e1, EE, i, i1, o, o1, OO, u, u1
  • consonants: b, d, dz, dZZ, f, g, JJ, k, l, LL, m, n, nf, ng, p, r, rr, s, SS, t, ts, tSS, v, w, y, z

PortugueseG2p

  • vowels: a, a~, e, e~, E, i, i~, o, o~, O, u, u~
  • consonants: b, d, dZ, f, g, j, j~, J, k, l, L, m, n, p, r, R, s, S, t, tS, v, w, w~, X, z, Z

RussianG2p

  • vowels: a, aa, ay, ee, i, ii, ja, je, jo, ju, oo, u, uj, uu, y, yy
  • consonants: b, bb, c, ch, d, dd, f, ff, g, gg, h, hh, j, k, kk, l, ll, m, mm, n, nn, p, pp, r, rr, s, sch, sh, ss, t, tt, v, vv, z, zh, zz

SpanishG2p

  • vowels: a, e, i, o, u
  • consonants: b, B, ch, d, D, f, g, G, gn, I, k, l, ll, m, n, p, r, rr, s, t, U, w, x, y, Y, z

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