---
id:
aliases: []
title: "2025-12-19"
tags:
  - authorship/original
  - destiny/permanent
  - status/draft
  - type/daily
---
# 2025-12-19

## 2025-12-19 06:22

PowerShell module to assist in translating between banjo fingerings and concert notes,
as well as between [[lilypond]] and conventional notation.

```powershell
$Db4 = [Note]::FromLilyPond("des'")
$Db4.PlayInTime(1/4,120)

$str1 = [FrettedStringTuning]::FromOpen([Note]::FromLilyPond("d,,,"))
$str1c2 = $str1.Capo(2)

$openGtuning = [FrettedStringInstrumentTuning]::FromStringTunings(@(
    [FrettedStringTuning]::FromOpen([Note]::FromLilyPond("d,,,")),
    [FrettedStringTuning]::FromOpen([Note]::FromLilyPond("b,,")),
    [FrettedStringTuning]::FromOpen([Note]::FromLilyPond("g,")),
    [FrettedStringTuning]::FromOpen([Note]::FromLilyPond("d")),
    [FrettedStringTuning]::FromOpen([Note]::FromLilyPond("g'")),
    # note: the notation used above is concert octave,
    # banjo is transposed up one octave.
))
$openGtuning.GetNoteFromFingering(4,11).PlayInTime(1/4,120) # play Db4

$openGc2tuning = $openGtuning.Capo(2)
$openGc2tuning.GetNoteFromFingering(4,9).PlayInTime(1/4,120) # play Db4

# TODO: class FrettedStringInstrument

```

```powershell
class Note {
    [Note] TransposeOctave([Note]$note1,[Note]$note2) {}
    [Note] TransposeOctave([int]$modifier) {}
}
```