37.md

0x37 Radio Tone/Select

Radio 0x68 → GT 0x3b

BMBT only.

This command allows the radio to load the appropriate Tone (EQ) and Select (playback options) menus.

The Tone and Select functionality as introduced with the C23/C24 was almost unusable owing to the counterintuitive UX. Thankfully, the NG radios, and the accompanying UI update (3-1/40+) implemented a number of changes to make the functionality somewhat suitable for humans.

Related Commands

• 0x36 Radio EQ
• 0x46 Radio UI

Example Frames

The message length alternates between two fixed lengths. The longer of the two is a single use case.

68 04 3B 37 05 65
68 04 3B 37 35 55
68 04 3B 37 14 74
68 04 3B 37 50 30
68 04 3B 37 C0 A0
68 04 3B 37 E0 80

# Singular use case. See "Tone (Set)"
68 07 3B 37 82 19 15 0E E3
68 07 3B 37 82 10 10 00 E1
68 07 3B 37 80 00 00 10 F3

Parameters

Fixed length. One byte bitfield.

FUNCTION  = 0b1100_0000
ROW       = 0b0011_0000

# Applies to FUNCTION_SELECT_NG
SOURCE    = 0b0000_1000
OPTS      = 0b0000_0111

# Applies to FUNCTION_TONE_SET
VALUE_BASS      = 0b1_1111 << 3 # FUNCTION_TONE_SET & VALUE_BASS
VALUE_TREBLE    = 0b1_1111 << 2
VALUE_FADER     = 0b1_1111 << 1
VALUE_BALANCE   = 0b1_1111 << 0

Function 0b1100_0000

A distinction between legacy and NG radios is required with respect to Select as the NG radios (and accompanying updated UI) introduced new behaviour.

FUNCTION_SELECT_NG      = 0b0000_0000
FUNCTION_SELECT         = 0b0100_0000
FUNCTION_TONE_SET       = 0b1000_0000
FUNCTION_TONE           = 0b1100_0000

Row 0b0011_0000

Both Tone and Select menus will have up to four rows.

You'd rightly presume ROW_A, would be the first row, ROW_B the second, and so on, however, the rows are rendered in... reverse.

ROW_A is still highlighted by default, the rows are still cycled in order A, B, C, D, and if only three rows are needed, ROW_D is omitted, but... yeah, just all upside down.

ROW_A   = 0b0000_0000   # Default. Appears as the "last" row.
ROW_B   = 0b0001_0000   # Appears at the "second last" row etc.
ROW_C   = 0b0010_0000
ROW_D   = 0b0011_0000   # Omitted if only three rows req.

Source 0b0000_1000

Only applies to Select, and NG radios. (FUNCTION_SELECT_NG)

In order to display appropriate source Select options, NG radios must specify source. Legacy radios do not specify source as it is implied by the title writes 0x23.

Note: the tape playback options were deprecated with the updated UI and NG radios.

SOURCE_RADIO            = 0b0000_0000
SOURCE_CDC              = 0b0000_1000

Opts 0b0000_0111

Only applicable to updated UI. Utilised by the NG radios only. (FUNCTION_SELECT_NG)

OPTS_HIGHLIGHT          = 0b0000_0100   # Default "hover" state
OPTS_ACTIVE             = 0b0000_0101

Value 0b0001_1111

Only applicable to FUNCTION_TONE_SET.

See Value in 0x36 Radio EQ

Use Cases

Select (BM53)

Radio

Bitwise	Value	Symbol	Text	State
FUNCTION_SELECT_NG & ROW_D & SOURCE_RADIO & OPTS_HIGHLIGHT	0x34	I	Search non sensitive	Highlight
FUNCTION_SELECT_NG & ROW_D & SOURCE_RADIO & OPTS_ACTIVE	0x35	< I >	Search non sensitive	Activated
FUNCTION_SELECT_NG & ROW_C & SOURCE_RADIO & OPTS_HIGHLIGHT	0x24	II	Search sensitive	Highlight
FUNCTION_SELECT_NG & ROW_C & SOURCE_RADIO & OPTS_ACTIVE	0x25	< II >	Search sensitive	Activated
FUNCTION_SELECT_NG & ROW_B & SOURCE_RADIO & OPTS_HIGHLIGHT	0x14	SCAN	Station sample	Highlight
FUNCTION_SELECT_NG & ROW_B & SOURCE_RADIO & OPTS_ACTIVE	0x15	SCAN	Station sample	Activated
FUNCTION_SELECT_NG & ROW_A & SOURCE_RADIO & OPTS_HIGHLIGHT	0x04	m	Manual station choice	Highlight
FUNCTION_SELECT_NG & ROW_A & SOURCE_RADIO & OPTS_ACTIVE	0x05	< m >	Manual station choice	Activated

CDC

Bitwise	Value	Symbol	Text	State
FUNCTION_SELECT_NG & ROW_D & SOURCE_CDC & OPTS_HIGHLIGHT	0x3c	< >	Music search	Highlight
FUNCTION_SELECT_NG & ROW_D & SOURCE_CDC & OPTS_ACTIVE	0x3d	< >	Music search	Activated
FUNCTION_SELECT_NG & ROW_C & SOURCE_CDC & OPTS_HIGHLIGHT	0x2c	RANDOM	Random generator	Highlight
FUNCTION_SELECT_NG & ROW_C & SOURCE_CDC & OPTS_ACTIVE	0x2d	RANDOM	Random generator	Activated
FUNCTION_SELECT_NG & ROW_B & SOURCE_CDC & OPTS_HIGHLIGHT	0x1c	SCAN	Track sample	Highlight
FUNCTION_SELECT_NG & ROW_B & SOURCE_CDC & OPTS_ACTIVE	0x1d	SCAN	Track sample	Activated
FUNCTION_SELECT_NG & ROW_A & SOURCE_CDC & OPTS_HIGHLIGHT	0x0c	<< >>	Fast forward/reverse	Highlight
FUNCTION_SELECT_NG & ROW_A & SOURCE_CDC & OPTS_ACTIVE	0x0d	<< >>	Fast forward/reverse	Activated

Select (C23)

Source is inherent for the C23, so the examples below just reflect the three possible contexts: radio, CDC, and tape.

Legacy radios do not support cycling through, or selecting options via the navigation dial. Cycling options requires repeated use of the BMBT's SELECT button. As for "activating" a highlighted option, I've not the faintest idea, just mash the BMBT buttons and see how you go.

Note: the below is a C23 BM with MK4 (4-1/00) which is an unlikely pairing, but I couldn't be bothered busting out an early "MK1" video module.

Radio

Row four/D is omitted as there are only three options.

Bitwise	Value	Symbol	Text
FUNCTION_SELECT & ROW_C	0x60	a	Automatic search
FUNCTION_SELECT & ROW_B	0x50	SCAN	Station sample
FUNCTION_SELECT & ROW_A	0x40	m	Manual station choice

CDC

Bitwise	Value	Symbol	Text
FUNCTION_SELECT & ROW_D	0x70	< >	Music Search
FUNCTION_SELECT & ROW_C	0x60	RANDOM	Random generator
FUNCTION_SELECT & ROW_B	0x50	SCAN	Track sample
FUNCTION_SELECT & ROW_A	0x40	<< >>	Fast forward/reverse

Tape

Rows three (ROW_C) and four (ROW_D) are omitted as there are only two options.

Bitwise	Value	Symbol	Text
FUNCTION_SELECT & ROW_B	0x50	<< >>	Fast forward/reverse
FUNCTION_SELECT & ROW_A	0x40	< >	Music Search

Tone (Set)

This is the single use case that affects the message length.

When the radio requests Tone (EQ) be displayed, it simultaneously sets the value of each property.

# Tone (Set): Neutral values
# FUNCTION_TONE_SET & 0x10 => 0x90
68 07 3B 37 90 10 10 00 F3

# Tone (Set): Minimum values
# FUNCTION_TONE_SET & 0x1c => 0x9c
68 07 3B 37 9C 1C 1F 1F E3

# Tone (Set): Maximum values
# FUNCTION_TONE_SET & 0x0c => 0x8c
68 07 3B 37 8C 0C 0F 0F E3

Tone

Bitwise	Value	Text	State
FUNCTION_TONE & ROW_D	0xf0	Balance	Highlight
FUNCTION_TONE & ROW_C	0xe0	Fader	Highlight
FUNCTION_TONE & ROW_B	0xd0	Treble	Highlight
FUNCTION_TONE & ROW_A	0xc0	Bass	Highlight